Not familiar with that model bell, but to put the ANSAT into perspective it is a 3 ton helo with the capacity to carry 10 passengers. It is half the size of the Ka-60, but the Ka-60 is a 6 ton helo with a 2.5 ton payload capability. The previously most common Russian naval helo is the Ka-27 series with a weight of 12 tons or so with a 5 ton payload capacity. The 600km range of the ANSAT should be plenty for operations from small vessels and a large percentage of internal space will probably be taken with equipment and perhaps extra fuel. I doubt a small vessel would need a helo that could carry a large fraction of the ships crew in one go… unless it is used to transport bording parties. The proliferation of MANPADS would suggest this would not be ideal, so perhaps a customised model with some transport capacity but also more internal equipment like sensors and processing equipment with more fuel to compensate perhaps would be likely.