Hi, > Need to resolve: > 1. Steerable thrusters or single stationary thruster > with rudder and dive planes. Rudder and dive planes really only work if you are at speed. A PSUB is a poke along and look type of vessel. I would suggest steerable thrusters. > 2. Style of viewports (my prefered is flat acrylic) > Flat is simplest and cheapest. Regards, Ray