We did exactly that - well, one of the crew's job was to fix eyes on the head (not much point extending the arm, we turned the sailboat as quickly as we could),

We did exactly that - well, one of the crew's job was to fix eyes on the head (not much point extending the arm, we turned the sailboat as quickly as we could), but due to being just a typical sail yacht's one meter above sea level it took only a few seconds of movement of the boat for the head to be invisible among the choppy waters.