The yard, the line must've slipped.
3 seconds sound clip from the The Viking Women and the Sea Serpent (1958) movie soundboard.
You can hear this line at 00:12:18.847 in the Blu-ray version of the movie.
Quote context
[...]
- Come on, better get some sleep.
- Night.
- Women, you think they never saw a whale before.
- They haven't, Ottar. Not everyone is as well-traveled as you.
- Get these swords polished. Stowaways must work their passage.
- Nevertheless, someday you'll be glad I came along.
- The yard, the line must've slipped.
- This couldn't have slipped, I made it fast myself.
- Never mind, just get the sail back up.
- Look there! The monster of the vortex.
- I always thought it was just a sailor's tale, it's true.
[...]