Went out on “Prince Charlie” with Acting S.G. & G.L.2 class firing. Left about 7.30. “Prince Charlie” Submaring Decoy ship. Had 1 12 pdr and 26 pdr guns. Very heavy swell on when we got under bridge. Went out as far as May Island. Ship rolling horribly. Nearly all hands sick, including self. S.G. class did not fire as too rough. Got back to ship about 2.0 p.m. Hands had to make & mend. Got Christmas dinner ready.