Future Sailing

Darnit, went out rowing and missed the deadline for Tillerman's writing challenge, and it is important that someone tells the truth about sailing 25 years from now. Because there ain't goin' to be none. Global warming will have raised sea levels so we will all be living under the sea. The surface will be covered with an impenetrable scum of oil-coated garbage, stirred up by violent and unpredictable storms, making sailing impossible. Oil will have run out, so power boats will no longer function.
The only viable water transport will be the rowable submarine, invented by Dutch genius Cornelius Drebbel four centuries ago.
Periscope depth, and row all!