16. Commitments and Contingencies a) Vessels under Construction As at December 31, 2014, the Company was committed to the construction of eight LNG carriers, four long-distance towing and offshore installation vessels, three FAUs, one FSO conversion and one FPSO upgrade for a total cost of approximately $2.8 billion, excluding capitalized interest and other miscellaneous construction costs. Two LNG carriers are scheduled for delivery in 2016, three LNG carriers are scheduled for delivery in 2017 and three LNG carriers are scheduled for delivery in 2018, four long-distance towing and offshore installation vessels are scheduled for delivery in 2016, one FAU delivered in February 2015 and two FAUs are scheduled for delivery in 2016, the one FSO conversion is scheduled for completion in early-2017 and the one FPSO upgrade is scheduled for completion in the first quarter of 2016. As at December 31, 2014, payments made towards these commitments totaled $421.9 million (excluding $9.6 million of capitalized interest and other miscellaneous construction costs) and the carrying value of completed units not yet in service was $1.3 billion. As at December 31, 2014, the remaining payments required to be made under these newbuilding and conversion capital commitments were $616.8 million (2015), $890.0 million (2016), $517.5 million (2017) and $350.9 million (2018). b) Purchase Obligations As at December 31, 2014, Teekay Offshore was committed to the purchase of six long-distance towing and offshore installation vessels for a total cost of approximately $220 million. Four long-distance towing and offshore installation vessels delivered in the first and early in the second quarter of 2015, and two long-distance towing and offshore installation vessels are scheduled for delivery in the rest of second quarter of 2015. In December 2014, Teekay Tankers signed an agreement to acquire one 2008-built Aframax tanker for a purchase price of $37 million and placed $3.7 million in an escrow fund related to this purchase. In December 2014,