1) Description of Business

KNOT Offshore Partners LP (the “Partnership”) is a publicly traded Marshall Islands limited partnership initially formed for the purpose of acquiring 100% ownership interests in four shuttle tankers owned by Knutsen NYK Offshore Tankers AS (“KNOT”) in connection with the Partnership’s initial public offering of common units (the “IPO”), which was completed in April 2013.

As of June 30, 2017, the Partnership had a fleet of thirteen shuttle tankers, the Windsor Knutsen, the Bodil Knutsen, the Recife Knutsen, the Fortaleza Knutsen, the Carmen Knutsen, the Hilda Knutsen, the Torill Knutsen, the Dan Cisne, the Dan Sabia, the Ingrid Knutsen, the Raquel Knutsen, the Tordis Knutsen and the Vigdis Knutsen, each referred to as a “Vessel” and, collectively, as the “Vessels.” The Vessels operate under fixed charter contracts to charterers.

The initial term for a time charter or bareboat charter commences upon the vessel’s delivery to the customer. The Partnership’s charters include options, exercisable by the customer, to extend the charter’s initial term. Pursuant to the Omnibus Agreement, KNOT has agreed to guarantee the payments of the hire rate under the initial charters for the Windsor Knutsen and the Bodil Knutsen for five years from the closing of the Partnership’s IPO. The time charter for the Windsor Knutsen expires in 2018 and the charterer has five one-year extension options. The time charter for the Bodil Knutsen expires in 2019 and contains customer options for extension through 2024. The Recife Knutsen and the Fortaleza Knutsen are under bareboat charter contracts that expire in 2023. The time charter for the Carmen Knutsen expires in 2023 and contains customer options for extension through 2026. The time charters for the Hilda Knutsen and the Torill Knutsen each expire in 2018 and contain a customer option for extension through 2023. The Dan Cisne and the Dan Sabia are under bareboat charter contracts that expire in 2023 and 2024, respectively. The time charter for the Ingrid Knutsen expires in 2024 and contains customer options for extension through 2029. The time charter for the Raquel Knutsen expires in 2025 and contains customer options for extension through 2030. The time charter for the Tordis Knutsen expires in 2022 and contains customer options for extension through 2032. The time charter for the Vigdis Knutsen expires in 2022 and contains customer options for extension through 2032.

Under the Partnership’s Amended and Restated Agreement of Limited Partnership (the “Partnership Agreement”), KNOT Offshore Partners GP LLC, a wholly owned subsidiary of KNOT, and the general partner of the Partnership (the “General Partner”), has irrevocably delegated to the Partnership’s board of directors the power to oversee and direct the operations of, manage and determine the strategies and policies of the Partnership. During the period from the Partnership’s IPO in April 2013 until the time of the Partnership’s first annual general meeting (“AGM”) on June 25, 2013, the General Partner retained the sole power to appoint, remove and replace all members of the Partnership’s board of directors. From the first AGM, four of the seven board members became electable by the common unitholders and accordingly, from this date, KNOT, as the owner of the General Partner, no longer retains the power to control the Partnership’s board of directors and, hence, the Partnership. As a result, the Partnership is no longer considered to be under common control with KNOT and as a consequence, the Partnership will not account for any vessel acquisitions from KNOT after June 25, 2013 as a transfer of equity interests between entities under common control.

On January 10, 2017, the Partnership issued and sold 2,500,000 common units in an underwritten public offering (see Note 16(a) — Equity Offering), raising approximately $54.9 million in net proceeds.

On February 2, 2017, the Partnership issued and sold in a private placement 2,083,333 Series A Convertible Preferred Units (“Series A Preferred Units”) at a price of $24.00 per unit. After deducting estimated fees and expenses, the net proceeds from the sale were approximately $48.6 million.

On March 1, 2017, the Partnership’s wholly owned subsidiary, KNOT Shuttle Tankers AS, acquired KNOT Shuttle Tankers 24 AS, the company that owns the Tordis Knutsen, from KNOT. The acquisition of the Tordis Knutsen was accounted for as an acquisition of a business. As a result, the Partnership has recorded the results of operations of the Tordis Knutsen in its consolidated statement of operations from March 1, 2017. See Note 15—Business Acquisitions.

On June 1, 2017, KNOT Shuttle Tankers AS acquired KNOT Shuttle Tankers 25 AS, the company that owns the Vigdis Knutsen, from KNOT. The acquisition of the Vigdis Knutsen was accounted for as an acquisition of a business. As a result, the Partnership has recorded the results of operations of the Vigdis Knutsen in its consolidated statement of operations from June 1, 2017. See Note 15—Business Acquisitions.

On June 30, 2017, the Partnership issued and sold in a second private placement 1,666,667 additional Series A Preferred Units at a price of $24.00 per unit. After deducting estimated fees and expenses, the net proceeds from the sale were approximately $38.8 million.

2) Summary of Significant Accounting Policies

(a) Basis of Preparation

The accompanying unaudited condensed consolidated interim financial statements are prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) for interim financial information. In the opinion of management of the Partnership, all adjustments considered necessary for a fair presentation, which are of normal recurring nature, have been included. All intercompany balances and transactions are eliminated. The unaudited condensed consolidated financial statements do not include all the disclosures and information required for a complete set of annual financial statements; and, therefore, these unaudited condensed consolidated financial statements should be read in conjunction with the Partnership’s audited consolidated financial statements for the year ended December 31, 2016, which are included in the Partnership’s Annual Report on Form 20-F (the “2016 20-F”).

(b) Significant Accounting Policies

The accounting policies adopted in the preparation of the unaudited condensed consolidated interim financial statements are consistent with those followed in the preparation of the Partnership’s audited consolidated financial statements for the year ended December 31, 2016, as contained in the Partnership’s 2016 20-F.

(c) Recent Accounting Pronouncements

Adoption of new accounting standards

There are no accounting pronouncements effective for the period, whose adoption had a material impact on the consolidated financial statements in the current period.

Accounting pronouncements to be adopted

In February 2016, the Financial Accounting Standards Board (“FASB”) issued revised guidance for leasing. The objective is to establish the principles that lessors and lessees shall apply to report useful information to users of financial statements about the amount, timing and uncertainty of cash flows arising from a lease. The standard is effective for annual periods beginning after December 15, 2018. The Partnership is currently assessing the impact the adoption of this standard will have on the consolidated financial statements.

In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers, which provides new authoritative guidance on the methods of revenue recognition and related disclosure requirements. This new standard supersedes all existing revenue recognition requirements, including most industry-specific guidance. The new standard requires a company to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. The new standard also requires additional qualitative and quantitative disclosures. In April 2015 the FASB proposed to defer the effective date of the guidance by one year. Based on this proposal, public entities would need to apply the new guidance for annual and interim periods beginning after December 15, 2017, and may apply it, at the company’s option, retrospectively to each period presented or as a cumulative-effect adjustment as at the date of adoption. Early adoption is not permitted until periods beginning after December 15, 2016. The Partnership has begun an initial assessment of the impact of this standard update on its consolidated financial statements and related disclosures and expects to adopt the standard from January 1, 2018. Based on the analysis to date, the Partnership does not expect the pattern of revenue recognition under the new guidance to materially differ from its current revenue recognition pattern and expects to transition using a modified retrospective approach whereby it will record the cumulative effect of applying the new standard to all outstanding contracts as at January 1, 2018 as an adjustment to opening retained earnings.

Any other accounting pronouncements yet to be adopted by the Partnership are consistent with those disclosed in the Partnership’s audited consolidated financial statements for the year ended December 31, 2016.

3) Segment Information

The Partnership has not presented segment information as it considers its operations to occur in one reportable segment, the shuttle tanker market. As of June 30, 2017, the Partnership’s fleet consisted of thirteen vessels and operated under nine time charters and four bareboat charters. As of June 30, 2016, the Partnership’s fleet consisted of ten vessels and operated under six time charters and four bareboat charters. Under the time charters and bareboat charters, the charterer, not the Partnership, controls the choice of which trading areas the applicable Vessel will serve. Accordingly, the Partnership’s management, including the chief operating decision makers, does not evaluate performance according to geographical region.

The following table presents revenues and percentages of consolidated revenues for customers that accounted for more than 10% of the Partnership’s consolidated revenues during the three and six months ended June 30, 2017 and 2016. All of these customers are subsidiaries of major international oil companies.

4) Insurance Proceeds

In February 2017, the Raquel Knutsen damaged its propeller hub. As a result, the Vessel was off-hire from February 22, 2017 to May 15, 2017 for repairs. Under the Partnership’s loss of hire policies, its insurer will pay the Partnership the hire rate agreed in respect of each vessel for each day, in excess of 14 deductible days, for the time that the Vessel is out of service as a result of damage, for a maximum of 180 days. The Partnership received payments for loss of hire insurance of $2.15 million and $2.9 million during the three and six months ended June 30, 2017, respectively.

In addition, for the three and six months ended June 30, 2017, the Partnership recorded $2.17 million and $3.89 million, respectively, for recoveries up to the amount of loss under hull and machinery insurance for the repairs as a result of the propeller hub damage to the Raquel Knutsen. For the three and six months ended June 30, 2017, $0.1 million and $0.1 million, respectively, is classified under vessel operating expense along with the cost of the repairs.

5) Other Finance Expenses

(a) Interest Expense

A reconciliation of total interest cost and interest expense as reported in the consolidated statements of operations for the three and six months ended June 30, 2017 and 2016:

(b) Other Finance Expense

The following table presents the other finance expense for three and six months ended June 30, 2017 and 2016:

6) Derivative Instruments

The unaudited condensed consolidated interim financial statements include the results of interest rate swap contracts to manage the Partnership’s exposure related to changes in interest rates on its variable rate debt instruments and the results of foreign exchange forward contracts to manage its exposure related to changes in currency exchange rates on its operating expenses, mainly crew expenses, in currency other than U.S. Dollars and on its contract obligations. The Partnership does not apply hedge accounting for derivative instruments. The Partnership does not speculate using derivative instruments.

By using derivative financial instruments to economically hedge exposures to changes in interest rates, the Partnership exposes itself to credit risk and market risk. Derivative instruments that economically hedge exposures are used for risk management purposes, but these instruments are not designated as hedges for accounting purposes. Credit risk is the failure of the counterparty to perform under the terms of the derivative instrument. When the fair value of a derivative instrument is positive, the counterparty owes the Partnership, which creates credit risk for the Partnership. When the fair value of a derivative instrument is negative, the Partnership owes the counterparty, and, therefore, the Partnership is not exposed to the counterparty’s credit risk in those circumstances. The Partnership minimizes counterparty credit risk in derivative instruments by entering into transactions with major banking and financial institutions. The derivative instruments entered into by the Partnership do not contain credit risk-related contingent features. The Partnership has not entered into master netting agreements with the counterparties to its derivative financial instrument contracts.

Market risk is the adverse effect on the value of a derivative instrument that results from a change in interest rates, currency exchange rates or commodity prices. The market risk associated with interest rate contracts is managed by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken.

The Partnership assesses interest rate risk by monitoring changes in interest rate exposures that may adversely impact expected future cash flows and by evaluating economical hedging opportunities.

The Partnership’s variable interest rate mortgage debt obligations expose the Partnership to variability in interest payments due to changes in interest rates. The Partnership believes that it is prudent to limit the variability of a portion of its interest payments. To meet this objective, the Partnership has entered into London Interbank Offered Rate (“LIBOR”)-based interest rate swap contracts to manage fluctuations in cash flows resulting from changes in the benchmark interest rate of LIBOR. These swaps change the variable rate cash flow exposure on the mortgage debt obligations to fixed cash flows. Under the terms of the interest rate swap contracts, the Partnership receives LIBOR-based variable interest rate payments and makes fixed interest rate payments, thereby creating the equivalent of fixed rate debt for the notional amount of its debt hedged.

As of June 30, 2017, the Partnership had entered into various interest swap agreements for a total notional amount of $536.7 million to hedge against the interest rate risks of its variable rate borrowings. Under the terms of the interest rate swap agreements, the Partnership receives interest based on three or six month LIBOR and pays a weighted average interest rate of 1.65%.

As of June 30, 2017 and December 31, 2016, the total notional amount of the Partnership’s outstanding interest rate swap contracts that were entered into in order to hedge outstanding or forecasted debt obligations were $536.7 million and $446.7 million, respectively. As of June 30, 2017 and December 31, 2016, the carrying amount of the interest rate swaps contracts were net assets of $2.1 million and $0.8 million, respectively. See Note 7—Fair Value Measurements.

Changes in the fair value of interest rate swap contracts are reported in realized and unrealized gain (loss) on derivative instruments in the same period in which the related interest affects earnings.

The Partnership and its subsidiaries utilize the U.S. Dollar as their functional and reporting currency, because all of their revenues and the majority of their expenditures, including the majority of their investments in vessels and their financing transactions, are denominated in U.S. Dollars. Payment obligations in currencies other than the U.S. Dollar, and in particular operating expenses in Norwegian Kroner (NOK), expose the Partnership to variability in currency exchange rates. The Partnership believes that it is prudent to limit the variability of a portion of its currency exchange exposure. To meet this objective, the Partnership entered into foreign exchange forward contracts to manage fluctuations in cash flows resulting from changes in the exchange rates towards the U.S. Dollar. The agreements change the variable exchange rate to fixed exchange rates at agreed dates.

As of June 30, 2017 and December 31, 2016, the total contract amount in foreign currency of the Partnership’s outstanding foreign exchange forward contracts that were entered into to economically hedge outstanding future payments in currencies other than the U.S. Dollar were NOK 332.5 million and NOK 290.1 million, respectively. As of June 30, 2017 and December 31, 2016, the carrying amount of the Partnership’s foreign exchange forward contracts was a net liability of $0.2 million and $1.3 million, respectively. See Note 7—Fair Value Measurements.

The following table presents the realized and unrealized gains and losses that are recognized in earnings as net gain (loss) for derivative instruments for the three and six months ended June 30, 2017 and 2016:

7) Fair Value Measurements

(a) Fair Value of Financial Instruments

The following table presents the carrying amounts and estimated fair values of the Partnership’s financial instruments as of June 30, 2017 and December 31, 2016. Fair value is defined as the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.

The carrying amounts shown in the table above are included in the condensed consolidated balance sheets under the indicated captions. The carrying value of trade accounts receivable, trade accounts payable and receivables/payables to owners and affiliates approximate their fair value.

The fair values of the financial instruments shown in the above table as of June 30, 2017 and December 31, 2016 represent the amounts that would be received to sell those assets or that would be paid to transfer those liabilities in an orderly transaction between market participants at that date. Those fair value measurements maximize the use of observable inputs. However, in situations where there is little, if any, market activity for the asset or liability at the measurement date, the fair value measurement reflects the Partnership’s own judgment about the assumptions that market participants would use in pricing the asset or liability. Those judgments are developed by the Partnership based on the best information available in the circumstances, including expected cash flows, appropriately risk-adjusted discount rates and available observable and unobservable inputs.

The following methods and assumptions were used to estimate the fair value of each class of financial instruments:

(b) Fair Value Hierarchy

The following table presents the placement in the fair value hierarchy of assets and liabilities that are measured at fair value on a recurring basis (including items that are required to be measured at fair value or for which fair value is required to be disclosed) as of June 30, 2017 and December 31, 2016:

The Partnership’s accounting policy is to recognize transfers between levels of the fair value hierarchy on the date of the event or change in circumstances that caused the transfer. There were no transfers into or out of Level 1, Level 2 or Level 3 as of June 30, 2017 and December 31, 2016.

8) Income Taxes

The Norwegian government is in negotiations with the EFTA Surveillance Authority to extend the effective date of the Norwegian Tonnage Tax regime (the “NTT”). Pursuant to those negotiations, Norway has proposed restrictions that would eliminate the ability of companies that own vessels under certain bareboat charters to qualify for the NTT. Companies that no longer qualify for the NTT would instead be subject to Norwegian corporate income tax.

Subsidiaries of the Partnership collectively own four vessels under bareboat charters. Under the currently proposed changes to the NTT, the subsidiaries that own those vessels would no longer qualify for the NTT and would instead be subject to Norwegian corporate income tax, potentially as of January 1, 2018. The Partnership is evaluating potential alternatives that would avoid any of its subsidiaries being disqualified from the NTT. However, until any changes to the NTT are finalized, the Partnership can make no assurances that it can avoid the disqualification of certain of its subsidiaries from the NTT.

Components of Current and Deferred Tax Expense

After the reorganization of the Partnership’s predecessor’s activities into the new group structure in February 2013, all profit from continuing operations in Norway is taxable within the Norwegian Tonnage Tax regime (“the tonnage tax regime”). The consequence of the reorganization was a one-time entrance tax into the tonnage tax regime due to the Partnership’s acquisition of the shares in the subsidiary that owns the Fortaleza Knutsen and the Recife Knutsen. Under the tonnage tax regime, the tax is based on the tonnage of the vessel and operating income is tax free. The net financial income and expense remains taxable as ordinary income tax for entities subject to the tonnage tax regime. For the portion of activities subject to the tonnage tax regime, tonnage taxes are classified as vessel operating expenses while the current and deferred taxes arising on net financial income and expense are reflected as income tax expense in the consolidated financial statements.

The total amount of the entrance tax was estimated to be approximately $3.0 million, which was recognized in the three months ended March 31, 2013. The entrance tax is payable over several years and is calculated by multiplying the tax rate by the declining balance of the gain, which will decline by 20% each year. The amount payable will be affected by the change in tax rate which was reduced to 24% in 2017 from 25% in 2016, from 27% in 2014 and from 28% in 2013 and the fluctuation in currency rates. Approximately $0.2 and $0.1 million of the entrance tax was paid during the first and second quarter of 2017, respectively, and $0.2 million was paid during the first quarter of 2016. UK income tax is presented as income taxes payable, while $0.7 million is presented as non-current deferred taxes payable.

Significant components of current and deferred income tax expense attributable to income from continuing operations for the three and six months ended June 30, 2017 and 2016 as follows:

The Partnership records a valuation allowance for deferred tax assets when it is more likely than not that some of or all of the benefit from the deferred tax assets will not be realized. In assessing the realizability of deferred tax assets, which relates to financial loss carry forwards and other deferred tax assets within the tonnage tax regime, the Partnership considers whether it is more-likely-than-not that some portion or all of the deferred tax assets will not be realized taking into account all the positive and negative evidence available. As of June 30, 2017 and December 31, 2016 there are no deferred tax assets recognized.

9) Vessels and Equipment

As of June 30, 2017 and December 2016, Vessels with a book value of $1,519 million and $1,257 million, respectively, are pledged as security held as a guarantee for the Partnership’s long-term debt. See Note 11—Long-term debt.

10) Intangible Assets

The intangible for the above market value of time charter contract associated with the Tordis Knutsen is amortized to time charter revenue on a straight line basis over the remaining term of the contract of approximately 4.8 years as of the acquisition date. The intangible for the above market value of time charter contract associated with the Vigdis Knutsen is amortized to time charter revenue on a straight line basis over the remaining term of the contract of approximately 4.9 years as of the acquisition date. Also see Note 15 – Business Acquisitions.

11) Long-Term Debt

As of June 30, 2017 and December 31, 2016, the Partnership had the following debt amounts outstanding:

The Partnership’s outstanding debt of $912.0 million as of June 30, 2017 is repayable as follows:

As of June 30, 2017, the interest rates on the Partnership’s loan agreements (other than tranche two of the $77.5 million loan facility) were the London Interbank Offered Rate (“LIBOR”) plus a fixed margin ranging from 1.9% to 2.5%. On the export credit loan of $44.6 million which is tranche two of the $77.5 million loan facility secured by the Ingrid Knutsen, the annual rate is 3.85% composed of a 2.5% bank facility rate plus a commission of 1.35% to the export credit guarantor. The guarantee commission of 1.35% is classified as other finance expense.

In April 2015, KNOT Shuttle Tankers 24 AS, the subsidiary owning the Tordis Knutsen, as the borrower, entered into a secured loan facility (the “Tordis Facility”). As of the time of the acquisition of the Tordis Knutsen on March 1, 2017, the aggregate amount outstanding under the facility was $114.4 million. The Tordis Facility is repayable in quarterly installments with a final balloon payment of $70.8 million due at maturity in November 2021. The Tordis Facility bears interest at an annual rate equal to LIBOR plus a margin of 1.9%. The facility is secured by a vessel mortgage on the Tordis Knutsen. The Tordis Knutsen, assignments of earnings, charterparty contracts and insurance proceeds are pledged as collateral for the Tordis Facility. The Partnership and KNOT Shuttle Tankers AS are the sole guarantors.

In April 2015, KNOT Shuttle Tankers 25 AS, the subsidiary owning the Vigdis Knutsen, as the borrower, entered into a secured loan facility (the “Vigdis Facility”). As of the time of the acquisition of the Vigdis Knutsen on June 1, 2017, the aggregate amount outstanding under the facility was $114.4 million. The Vigdis Facility is repayable in quarterly installments with a final balloon payment of $70.8 million due at maturity in February 2022. The Vigdis Facility bears interest at an annual rate equal to LIBOR plus a margin of 1.9%. The facility is secured by a vessel mortgage on the Vigdis Knutsen. The Vigdis Knutsen, assignments of earnings, charterparty contracts and insurance proceeds are pledged as collateral for the Vigdis Facility. The Partnership and KNOT Shuttle Tankers AS are the sole guarantors.

On May 26, 2017, the Partnership’s subsidiary, KNOT Shuttle Tankers 14 AS, which owns the vessel Hilda Knutsen, entered into a new $100 million senior secured term loan facility with Mitsubishi UFJ Lease & Finance (Hong Kong) Limited (the “New Hilda Facility”). The New Hilda Facility is repayable in twenty-eight (28) consecutive quarterly installments with a balloon payment of $58.5 million due at maturity. The New Hilda Facility bears interest at a rate per annum equal to LIBOR plus a margin of 2.2%. The facility matures in 2024 and is guaranteed by the Partnership and refinanced the $117 million loan facility associated with the Hilda Knutsen that bore interest at a rate of LIBOR plus 2.5% and was due to be paid in full in August 2018. As part of the refinancing, the $117 million loan facility including amortized loan expenses has been fully derecognized.

12) Related Party Transactions

(a) Related Parties

Net expenses (income) from related parties included in the unaudited condensed consolidated statements of operations for the three and six months ended June 30, 2017 and 2016 are as follows:

(b) Guarantees and Indemnifications

Pursuant to the Omnibus Agreement, KNOT agreed to guarantee the payments of the hire rate under the initial charters of each of the Windsor Knutsen and the Bodil Knutsen for a period of five years from the closing date of the IPO.

In April 2014, the Partnership was notified that Shell would not exercise its option to extend the Windsor Knutsen time charter after the expiration of its initial term. The vessel was re-delivered on July 28, 2014. In order to comply with its obligations under the Omnibus Agreement, on July 29, 2014, KNOT and the Partnership entered into a time charter for the vessel at a rate of hire that would have been in effect during the option period under the previous Shell time charter. This charter was effective until the new Shell time charter commenced in October, 2015. The new Shell charter has a hire rate that is lower than the hire rate in the initial charter. The difference between the new hire and the initial rate is paid by KNOT.

Under the Omnibus Agreement, KNOT has agreed to indemnify the Partnership until April 15, 2018, against certain environmental and toxic tort liabilities with respect to certain assets that KNOT contributed or sold to the Partnership to the extent arising prior to the time they were contributed or sold. However, claims are subject to a deductible of $0.5 million and an aggregate cap of $5 million.

(c) Transactions with Management and Directors

See the footnotes to Note 12(a)—Related Party Transactions for a discussion of the allocation principles for KNOT’s administrative costs, including management and administrative staff, included in the consolidated statements of operations.

(d) Amounts Due from (to) Related Parties

Balances with related parties consisted of the following:

Amounts due from (to) related parties are unsecured and intended to be settled in the ordinary course of business. They primarily relate to vessel management and other fees due to KNOT, KNOT Management, KOAS UK and KOAS.

(e) Trade accounts payables

Trade accounts payables to related parties are included in total trade accounts payables in the balance sheet. The balances to related parties consisted of the following:

(f) Long-term debt from related parties

The balances to related parties consisted of the following:

(g) Acquisitions from KNOT

On December 1, 2016, the Partnership acquired KNOT’s 100% interest in Knutsen NYK Shuttle Tankers 19 AS, the company that owns and operates the Raquel Knutsen. This acquisition was accounted for as an acquisition of a business.

On March 1, 2017, the Partnership acquired KNOT’s 100% interest in KNOT Shuttle Tankers 24 AS, the company that owns and operates the Tordis Knutsen. This acquisition was accounted for as an acquisition of a business.

On June 1, 2017, the Partnership acquired KNOT’s 100% interest in KNOT Shuttle Tankers 25 AS, the company that owns and operates the Vigdis Knutsen. This acquisition was accounted for as an acquisition of a business.

The board of directors of the Partnership (the “Board”) and the conflicts committee of the Board (the “Conflicts Committee”) approved the purchase price for each transaction described above. The Conflicts Committee retained a financial advisor to assist with its evaluation of each of the transactions. See Note 15—Business Acquisitions.

13) Commitments and Contingencies

Assets Pledged

As of June 30, 2017 and December 31, 2016, Vessels with a book value of $ 1,519 million and $1,257 million, respectively, were pledged as security held as guarantee for the Partnership’s long-term debt and interest rate swap obligations. See Note 6—Derivative Instruments and Note 11—Long-Term Debt.

Claims and Legal Proceedings

From time to time, the Partnership is involved in various claims and legal actions arising in the ordinary course of business. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on the consolidated financial position, results of operations or cash flows.

Insurance

The Partnership maintains insurance on all the Vessels to insure against marine and war risks, which include damage to or total loss of the Vessels, subject to deductible amounts that average $0.15 million per Vessel, and loss of hire.

Under the loss of hire policies, the insurer will pay a compensation for the lost hire rate agreed in respect of each Vessel for each day, in excess of 14 deductible days, for the time that the Vessel is out of service as a result of damage, for a maximum of 180 days. In addition, the Partnership maintains protection and indemnity insurance, which covers third-party legal liabilities arising in connection with the Vessels’ activities, including, among other things, the injury or death of third-party persons, loss or damage to cargo, claims arising from collisions with other vessels and other damage to other third-party property, including pollution arising from oil or other substances. This insurance is unlimited, except for pollution, which is limited to $1 billion per vessel per incident. The protection and indemnity insurance is maintained through a protection and indemnity association, and as a member of the association, the Partnership may be required to pay amounts above budgeted premiums if the member claims exceed association reserves, subject to certain reinsured amounts. If the Partnership experiences multiple claims each with individual deductibles, losses due to risks that are not insured or claims for insured risks that are not paid, it could have a material adverse effect on the Partnership’s results of operations and financial condition.

14) Earnings per Unit and Cash Distributions

The calculations of basic and diluted earnings per unit are presented below: