For use cruising, it pays to get a good pair of 7x50 binocs...Fujinon, Steiner, Nikon all make excellent products.
I would avoid image stabilized at sea given the need for electricity and added complication...but they work great.
The cheap stuff may suffice for casual sailing but eventually they fog and they don't provide the resolution and low light performance of the good stuff which can provide good service for decades.
No longer posting. Reach me by PM!