Sea-Vista Eco-Class Product Tankers, United States of America
The Sea-Vista Eco-class product tankers are being constructed by General Dynamics NASSCO, a wholly owned subsidiary of General Dynamics, for SEA-Vista Newbuild II, a joint venture (JV) between Seabulk Tankers, which is a wholly owned subsidiary of SEACOR Holdings and Avista Capital Partners.
Ohio product tanker is first of the four new Jones Act product tankers built by Aker Philadelphia Shipyard (APSI), a wholly owned US subsidiary of Aker Philadelphia Shipyard.
The two companies formed the JV by signing a contract in 2014. Avista invested approximately $150m for a non-controlling ownership interest in SEACOR subsidiaries along with the construction contract of three product tankers with NASSCO.
The three vessels are currently under construction according to the Jones Act requirements at the NASSCO shipyard in San Diego, with deliveries scheduled for May 2016, October 2016 and March 2017 respectively. As stipulated in the ship management and crew management agreements, the vessels will be managed and crewed by SEACOR subsidiaries.
The new vessels will address the transportation requirements for crude oil and refined product volumes in the US.
Sea-Vista Eco-class tankers construction
General Dynamics NASSCO signed a contract with Seabulk Tankers for the design and construction of two 50,000DWT LNG conversion-ready product tankers plus an option for an additional tanker, in September 2013.
The construction of the first product tanker was initiated in November 2014, while its keel laying ceremony was held in May 2015. Construction of the second and third product tankers began in June and October 2015 respectively.
Design and features of Sea-Vista tankers
The Sea-Vista product tankers are designed by DSEC, a subsidiary of Daewoo Shipbuilding and Marine Engineering (DSME), and will incorporate ECO MR (medium-range) tanker design, which allows for the installation of LNG fuel-gas system and tanks in future.
The ECO design enables the tankers to achieve improved fuel efficiency through features including a G-series MAN ME slow-speed main engine and an optimised hull form.
The tankers will also feature latest environmental protection systems, including a ballast water treatment system, which place them among the world's most fuel-efficient and eco-friendly tankers.
The vessels have an overall length of 186m, length between perpendiculars (LBP) of 178m, depth of 19.1m and moulded breadth of 32.2m. The design draught is 11m and scantling draught is 13.3m. Each tanker weighs 50,000t (dead weight) and has a 330,000 barrel cargo capacity.
The vessels are classified as the American Bureau of Shipping (ABS) class notations of +A1, Oil and Chemical Carrier, IMO Ship Type 3, ESP, CSR, AB-CM, CPS, +AMS, +ACCU, VEC, VEC-L, TCM, PMA+, GP, UWILD, SH, NBL, SHCM, and BWT.
Cargo tank capacity
Sea-Vista tankers will feature cargo tanks for storage, which will be divided into six groups, in addition to slop tanks to carry approximately 53,700m³ (337,000 barrels) of liquid products.
Engine and propulsion
The ECO-class will be powered by a set of conversion-capable, dual-fuel-capable G-series MAN ME slow-speed, auxiliary, main engine.
It will have a maximum continuous rating (MCR) of 7,700kW at 90.3rpm and nominal continuous rating (NCR) of 5,775kW at 82rpm. The daily fuel oil consumption (DFOC) of the vessels at NCR is approximately 22.2t/d.
The tankers will have a service speed of 14.5k at design draft and a cruising range of 10,200nmi. The onboard electricity will be supplied by three 1,240kW diesel generator sets.