How many things should I pay attention to about surface power supply?

Hi, guys! I plan to make a bigger and heavier ROV whose frame is the same as bluerov2, and what I want is that it can run longer time, so I choose the surface power supply.

If I choose a DC power in my boat which can supply high current(24V,100A), what I should pay attention except power loss.

If I choose an AC power(220V) in my boat, what I should pay attention except power loss.

Thank you!

@zanran8 Powering a vehicle over the tether is not a trivial task. It requires high voltages that can kill you. It should not be attempted without an intimate understanding of the principles and hazards at hand.

You can search this forum for “power tether” to see more discussion on the topic.