Everything on marine stuff tends to be flat-head or similar design -- engaging a flat driver into a slot in a bumpy/roll-y ocean is *hell*. Off topic:

Everything on marine stuff tends to be flat-head or similar design -- engaging a flat driver into a slot in a bumpy/roll-y ocean is *hell*. Off topic: the hell of a bumpy/roll-y ocean manually controlled lift crane arm operation is improved by a single rotating supporting pillar with an expandable webb-y forklift mechanism that goes in the water and retrieves the dive vessel with a one button push and Ai selfguiding.