Does this type of ship fit into these categories? Would it be of interest to anybody?
USNS Josiah Willard Gibbs T-AGOR-1 Oceanographic Research Ship
(former USS San Carlos AVP-52 Barnegat class small seaplane tender)
NavSource.org
http://www.navsource.org/archives/09/43/4351.htmThis ship can easily be built from the ISW USS Mackinac AVP-13 1/350 resin kit.

From DANFS:
http://www.history.navy.mil/danfs/s4/san_carlos.htmReactivated in 1958, San Carlos was taken out of the Reserve Fleet on 11 July and assigned to the Military Sea Transportation Service for conversion to an oceanographic research ship by the Mobile Ship Repair Co., Mobile, Ala. On 15 December 1958, she was renamed Josiah Willard Gibbs-in honor of the 19th Century mathematician and theoretical physicist-and reclassified AGOR-1. Three days later, on 18 December, she was placed in service.
As an AGOR, the ship has a crew of 48 and a scientific staff of 24. Alterations to her original design included the installation of six laboratories, a machine shop, a darkroom, and a superstructure deck locker for experimental stowage or work, a deep sea winch capable of handling up to 40,000 feet of wire rope and 20 tons of equipment.
After fitting out, the new AGOR, an MSTS ship, became the principal research vessel of the Hudson Laboratories of Columbia University, under contract to the Office of Naval Research; and, through the next decade, provided transportation, accommodations, and working spaces for American scientists and technicians investigating physical, chemical, and biological properties of the ocean. On 15 December 1971, she was transferred to Greece and renamed Hephaisto. Since then, into 1974, she has provided similar services to scientists of that country.