In some respects this might be the most departure from the original onscreen design primarily because I jettisoned the nacelles. The way I reason this craft being used those nacelles just don't make sense to me (though your mileage might vary). This is strictly a ship-to-surface and back vehicle meant for onsite survey of aquatic environments. It has only two drive systems: an antigrav system for flight and a hydro-drive for on-surface and below surface propulsion. While it can get into space it isn't meant to go very far such as traversing solar systems. Certainly with no stardrive it can't travel between star systems.
Like the heavy lander this craft is meant loaned out to starships for specific missions.