If just the covering insulation is stripped but the wires are OK on the antenna I would cover the gap with heat-shrink tubing (and have with one I still fly) but that is less of a problem than immersion. Depends a lot on the water. Dunk electrical components in distilled water and dry them out and there may be no effect. Dunk them in water with silt, high pH, minerals, etc. and bad things can happen. I'd send them in for a check-over.