In that variant, the R pentomino is an unstable oblique puffer, and the T tetromino it creates in Life will die rather than becoming 4 blinkers. My two plans are either glider synthesize the R, then clean it up, or use spartan R conduits and destroy them. I believe that the second one will work better because if you used glider, then you'd have to use some sort of oblique rake (maybe a caterloopillar?). Plus, cleaning up the debris made by the R would probably be easier because of the still lifes being there before they get destroyed.
EDIT: Here's how this reaction moves the boat:
Code: Select all
x = 10, y = 7, rule = B3/S23
$4bo4bo$4bo2bo$5b3o$2b2o$bobo$2bo!