I've never heard of it either, but as a Sick Bay Tiff I would have just mooched around ready to provide my medical services if required. I hope Liverpool's present Doc would have done the same. It's a tough job but we are trained in cat-like vigilance and masterly inactivity.
If you get as far as Panama these days, you can do the same with less effort in the Gatun Lake - anchor, CASASD, switch on the prewetting. Saves having a row with Chief about fresh water, too, if you are not alongside in Pompey.