A skydive performed with the intended purpose of landing in the water with snorkle gear or scuba equipment in addition to the regular skydiving eqipment.
Can also refer to a skydiver who has mistakenly landed in a body of water.
"Our whole load did a skybadive off the coast of Florida!"
"Those Navy Seals are now accomplished skybadivers."
"David really screwed up today! He landed off and went skybadiving!"