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Modutech selects RAL for new US Navy tug design

Dec 20, 2019 08:51 AM

The vessel will feature updates from the successful RAscal 1800-Z tugs

Courtesy RAL

The following is text of a news release from Robert Allan Ltd. (RAL):

(VANCOUVER, British Columbia) — Robert Allan Ltd. has been awarded a contract by Modutech Marine Inc. of Tacoma, Wash., to design a new version of the commercially successful RAscal 1800-Z tugs for the United States Navy.

This award builds on the success of Robert Allan Ltd.’s Z-Tech 4500 design for the U.S. Navy which currently operates six, identified as the YT 802 class, and has another six tugs, identified as the YT 808 class, currently under construction.

The new RAscal tug (with an option for one more) will be built by Modutech Marine at its facility in Tacoma. Known as the YT 815 the tug will be very similar to 10 RAscal 1800-Z tugs which have been built by Sanmar Shipyards in Turkey and already delivered to commercial clients in UAE, Turkey, Spain, and New Zealand.

The design for the U.S. Navy will include updates to suit new EPA Tier 4 engines and associated systems, extensive fendering above and below the waterline to handle U.S. Navy surface ships, submarines and barges as well as incorporating feedback from operators of the existing Z-Tech 4500 tugs. Wherever possible commonality in arrangement and systems to the existing Navy’s tugs Z-Tech 4500 tugs is being utilized to minimize training hours. The tugs are configured essentially as “day boats” but also provide accommodation for a crew of up to four people. Construction of the first tug is to commence in 2020.

The new tug will have the following particulars:

Length overall: 63 feet
Beam, molded: 30 fee 1 inch
Depth, molded: 11 feet 6 inches
Power: 2 x 970 kW (2 x 1,300 hp)
Bollard pull: 30 metric tons minimum

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