I think these guys work the opposite way Timbo
I read about a young Loic Peyron setting out late for a single-handed transatlantic race on a 50' cat. he made his bunk up against the windward daggerboard case so that he could knap with the remote for the self steering in his hand and an ear against the trunk. When the trunk was noisy, that meant that the hull was in the water and the boat was slowing and he would alter course to power up. When the trunk was quieter, that meant that the boat was flying and he could relax and SLEEP!