I would have thought there would be other things higher on the "to-do" list in this situation.
Yes! Like getting out the tide tables to correct the altitude of the water surface. According to PANS-OPS 26.4.9.3 (vii) para. 6a, night ditchings may only be carried out within 1hr either side of high water (increasing to 1.5hrs in spring tides). This only applies to latitudes above 43N, obviously.
Stabilised approach criteria come into their own in these situations as an overrun of the designated landing area could be critical. Also, after touchdown, all usages of left and right
must be replaced with "port" and "starboard", the F/O should be addressed as "first mate" and the in-charge cabin crew as "bosun".