Commitments and Contingencies and Other Matters

Commitments

Commitments Related to Our Fleet

We have charter agreements with Siem Offshore AS (“Siem”) for the Siem Helix 1 and Siem Helix 2 vessels used in connection with our contracts with Petrobras to perform well intervention work offshore Brazil. The initial term of the charter agreements with Siem is for seven years from the respective vessel delivery dates with options to extend. We have charter agreements for the Grand Canyon, Grand Canyon II and Grand Canyon III vessels for use in our robotics operations. The charter agreements expire in October 2019 for the Grand Canyon, in April 2021 for the Grand Canyon II and in May 2023 for the Grand Canyon III. We also had a charter agreement for the Deep Cygnus. On February 9, 2018, we terminated our charter for the vessel and returned it to its owner. The charter had originally been scheduled to end on March 31, 2018.

In September 2013, we executed a contract for the construction of a newbuild semi-submersible well intervention vessel, the Q7000, to be built to North Sea standards. Pursuant to the contract and subsequent amendments, 20% of the contract price was paid upon the signing of the contract in 2013, 20% was paid in each of 2016, 2017 and 2018, and the remaining 20% will be paid upon the delivery of the vessel, which at our option can be deferred until December 31, 2019. We are also contractually committed to reimburse the shipyard for its costs incurred in connection with the deferment of the Q7000’s delivery beyond 2017. At December 31, 2018, our total investment in the Q7000 was $403.8 million, including $276.8 million of installment payments to the shipyard. Currently equipment is being manufactured and/or installed for the completion of the vessel.

Lease Commitments

We lease facilities and equipment as well as charter vessels under non-cancelable operating leases and vessel charters expiring at various dates through 2031. Future minimum rental payments at December 31, 2018 are as follows (in thousands):



	Vessels		Facilities and Other		Total

2019	$	116,620	$	5,881	$	122,501
2020	96,800		5,340		102,140
2021	89,216		5,185		94,401
2022	90,371		5,064		95,435
2023	51,266		4,533		55,799
Thereafter	—		10,448		10,448
Total lease commitments	$	444,273	$	36,451	$	480,724

For the years ended December 31, 2018, 2017 and 2016, total rental expense was approximately $147.8 million, $114.5 million and $87.8 million, respectively.

We sublease some of our facilities under non-cancelable sublease agreements. For the years ended December 31, 2018, 2017 and 2016, total rental income was $1.4 million, $1.3 million and $1.6 million, respectively. As of December 31, 2018, the minimum rentals to be received in the future totaled $3.5 million.

In January 2016, we entered into an agreement to lease back our former office and warehouse property located in Aberdeen, Scotland for 15 years with two five-year options to extend the lease. The annual minimum lease payment is approximately $0.8 million.

Contingencies and Claims

We believe that there are currently no contingencies that would have a material adverse effect on our financial position, results of operations and cash flows.

Litigation

We are involved in various other legal proceedings, some involving claims for personal injury under the General Maritime Laws of the United States and the Jones Act based on alleged negligence. In addition, from time to time we incur other claims, such as contract and employment-related disputes, in the normal course of business.