Seili:
Owner: Arctia Finland
Length 50.5 m
Width 12.2 m
Depth 3.8 m
Gross tonnage 871 t
Main machinery Caterpillar 2.4 MW
Speed 12 knots
Letto:
Owner: Arctia, Finland
Length 43.6 m
Width 12.2 m
Depth 3.9 m
Gross tonnage 810 t
Net tonnage 221 t
Main engine 2500 kW Wärtsilä Vaasa 16 V 22 MD-D
Speed 12 knots
EVA-316 (ex-Lonna):
Owner: Estonian Maritime Administration
Length: 57.9 m
Width: 12.6 m
Depth: 3.7 m
Main engines: 2x 2200 kW
Ice class: 1A Super
This interesting series of ships was built at the Savonlinna shipyard in Rauma-Repola and handed over to the Finnish Maritime Administration in 1979–80. The ships were designed as heavy duty workhorses, and they have proven to be ships that are still – now more than 40 years after their completion – excellent in robust work vessel use, although each one has been modified during overhauls to suit the tasks at hand. In addition to heavy buoy work, for example, Seili, which has been converted into an oil spill response vessel, works in oil spill response readiness. Letto, on the other hand, has been working as far away as in the Barents Sea, converted into a geophysical and hydrographical survey vessel. The third vessel was handed over to Estonia in 1995 and renamed EVA-316, and in the 2004–06 major conversion work, for which we did all the design work, it was turned into an oil spill prevention vessel and icebreaker.
Over the decades, we have been closely involved as designers in the modification and conversion projects of every ship.
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