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‌The ship on the stamp was identified by the designer of the stamp Nadia Charles ( http://www.nadiacharles.com)
DOLOMIEU is used to fish yellowfin tuna (Thunnus albacares). Named after a 400 meter high lava shield inside Piton de la Fournaise ("Peak of the Furnace")
IMO 9651993
89,41x14,80x9,28 m cargo capacity 1000 t screw 33
Built 2012  by Piriou-SEAS (South East Asia Shipyard), Ben Luc, Vietnam) for Sapmer, La Réunion
4 engines 4T-8cyl Wartsila 8L20 14 knots for two electric engines on two variable-pitch propellers
Sisterships : BERNICA (IMO 9476240) - FRANCHE TERRE (IMO 9540156) - MANAPANY (IMO 9476238).

source:  http://www.cargos-paquebots.net/
image: http://philatelie.polaire.free.fr/
Information from .jean-louis araignon

Update on DOLOMIEU.
Built under yard No 41 as a purse sein tuna fishing vessel.
Keel laid down ?
Launched ?
Tonnage 2,666 grt, 799 nrt. Length bpp. 79.7m. draught 6.35m.
Powered diesel electric by four 8 cyl. diesel engines 5,163 hp (3,800 kW.), two electrical engines each 2,000 kW. One (not two) controllable pitch propeller, speed 14 knots.
22 March 2012 christened at the Nha Be site in Ho Chi Minh City.
30 March 2012 delivered to SAPMER, homeport La Reunion.

Source: Bureau Veritas.

Overall length: 89.41m.
Moulded beam: 14.50m.
Hold (dry storage -40°C): 1,470m³.
Tanks (storage in brine at -17°C): 539m³.
Fuel tanks: 760m³.
Crew: 33 persons
Speed: 17.5 kn.