To: ABN AMRO Bank N.V. as Agent for itself and each of the other parties to the Facility Agreement referred to below From: KNOT Shuttle Tankers 32 AS (as Borrower) Knutsen NYK Offshore Tankers AS (as Guarantor) KNOT Offshore Partners LP KNOT Shuttle...

Exhibit 4.22

To:		ABN AMRO Bank N.V. as Agent for itself and each of the other parties to the Facility Agreement referred to below
From:		KNOT Shuttle Tankers 32 AS (as Borrower) Xxxxxxx
		NYK Offshore Tankers AS (as Guarantor) KNOT
		Offshore Partners LP
		KNOT Shuttle Tankers AS

Dated:

Dear Sirs,

USD 60,000,000 Term Loan Facility Agreement dated 27 June, 2017 as amended by an amendment agreement dated 15 December, 2017 (the “Facility Agreement”)

1. We refer to the Facility Agreement. This accession letter (the ‘Accession Letter’) shall take effect as an Accession Letter for the purposes of the Facility Agreement. Terms defined in the Facility Agreement have the same meaning in this Accession Letter unless given a different meaning in this Accession Letter.

2. KNOT Offshore Partners LP (‘XXXX’) and KNOT Shuttle Tankers AS (‘KNOT ST’ and together with XXXX; the ‘Replacement Guarantors’) agree to become Replacement Guarantors with respect to all amounts outstanding under the Agreement and to be bound by the terms of the Agreement as Guarantors and Obligors pursuant to Clause 28.2 (Drop Down) of the Agreement.

3. XXXX’x and KNOT ST’s administrative details are as follows:

Address: 0 Xxxxxx Xxxx, Xxxxxxxx, Xxxxxxxxxxxxx XX00 0XX, Xxxxxx Xxxxxxx/ Xxxxxxxxxxx 00, 0000 Xxxxxxxxx, Xxxxxx

Fax: 00(0) 0000 000000 Attention: CEO/CFO

4. We confirm that the Repeating Representations are made by each of the Borrower, the Guarantor and the Replacement Guarantors on the date of this Accession Letter and that all Repeating Representations are true in all material respects on that date.

5. This Accession Letter is governed by Norwegian law and XXXX has appointed KNOT ST as its process agents in respect of this Accession Letter and the other Finance Documents.

THIS ACCESSION LETTER has been signed on behalf of the Guarantor, the Borrower and the Replacement Guarantors and is delivered on the date stated above.

Signed		/s/ Xxxx Xxxxxxx Bråstein Xxxx
		Name: Xxxx Xxxxxxx Bråstein Xxxx
		Position: Director
		KNOT Shuttle Tankers 32 AS
Signed		/s/ Xxxx Xxxxxxx Bråstein Xxxx
		Name: Xxxx Xxxxxxx Bråstein Xxxx
		Position: Senior Vice President
		Xxxxxxx NYK Offshore Tankers AS
Signed		/s/ Xxxx X. Xxxxxxx
		Name: Xxxx X. Xxxxxxx
		Position: Chief Executive Officer
		KNOT Offshore Partners LP
Signed		/s/ Xxxx Xxxxxxx Bråstein Xxxx
		Name: Xxxx Xxxxxxx Bråstein Xxxx
		Position: Director
		KNOT Shuttle Tankers AS