Finance Leases
Silversea Cruises operates two ships, the Silver Whisper and Silver Explorer, under finance leases. The finance lease for the Silver Whisper will expire in 2022, subject to an option to purchase the ship, and the finance lease for the Silver Explorer will expire in 2021, subject to an option to extend the lease for up to an additional six years. The total aggregate amount of the finance lease liabilities recorded for these ships at the acquisition date was $82.8 million. The lease payments on the Silver Whisper are subject to adjustments based on the LIBOR rate. Refer to Note 3. Business Combination for further information regarding the assets acquired and liabilities assumed in the Silversea Cruises acquisition.
ROYAL CARIBBEAN CRUISES LTD.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS (Continued)
Following is a schedule of annual maturities on our total debt net of debt issuance costs, and including capital leases and commercial paper, as of December 31, 2019 for each of the next five years (in thousands):
Note 10. Leases
Our operating leases primarily relate to preferred berthing arrangements, real estate and shipboard equipment and are included within Operating lease right-of-use assets, and Long-term operating lease liabilities with the current portion of the liability included within Current portion of operating lease liabilities in our consolidated balance sheet as of December 31, 2019. Leases with an initial term of 12 months or less are not recorded on the consolidated balance sheet. We recognize lease expense for these leases on a straight-line basis over the lease term. Refer to Note 2. Summary of Significant Accounting Policies, for further information on the adoption of ASC 842.

### Language ###
English

### Assessment ###
Extract the expiration year of Silver Explorer's finance lease

### Query ###
When does the Silver Explorer cruise ship's lease end?
When does the Silver Explorer cruise ship's lease end?