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Motor boats were widely used on US Warships in the 30es and early 40es for personel transport, transporting supplies and stores, and harbor duties. Many were fitted out for officer or admiral transport. These were faster then the launches, but had less capacity. 40ft variety was widely used on carriers, cruisers and battleships, until most of the boats were landed to make room for extra AA guns in late 1942-1943
This variant has the canopy doors and back open.
Use http://www.hnsa.org/resources/manuals-documents/single-topic/boats-of-the-united-states-navy/ for reference
If you need a set of boats for a specific ship, just send me a message. I would make a set tuned for your ship in a few days. List of boats can be found in most modeling plans.
Also, any other scale can be also produced. Just ask.
You will need to add a 2 bar railing around the steering platform on the rear, and low railing around the fore deck.