I’m studying some ideas for a future hard sci-fi adventure using Mongoose Traveller 2ed and Orbital 2100, with player characters landing in Europa (Jupiter’s moon) to study the chance of life in the ocean under the moon’s icy shell.
I’m thinking about giving them some kind of submarine vessels, like a bathyscaphe or armoured diving suits, and probably a mobile base. Have any of you thought about how to design a vehicle that can be at the same time a dropship and a terrestrial base/vehicle to travel over the surface of Europa and transport the bathyscaphe to a chosen site?
I'm planning to do it genuinely hard sci-fi, so it will have to deal with rather complicated things like those 5.4 Sv of surface radiation (see Colonization of Europa - Environment).
As for the player characters I'm planning to have a crew of scientists and, probably, some military types.