Vehicle Buoyancy

[kullboys]

Hello everyone
Is the intent in this iteration of the competition to maintain the 0.5% buoyancy requirement when the vehicle is killed as in past years? We are intending to design a secondary vehicle tied in with other work that has a buoyancy engine for depth control. The rules last year state that it must be positively buoyant when the kill switch is engaged, meaning this type of vehicle cannot meet that requirement. It could however empty the tank when the switch is pressed, giving it the positive buoyancy. Would this be acceptable?
Thanks.

[Daveman]

The intent is so that the vehicle floats to the surface when all goes wrong. In general terms, how will the buoyancy engine work? Will you be cycling through negative/neutral/positive to adjust your depth?