It was during the more pleasant weather, that in due rotation with the other seamen my first mast-head came round.
Pleasant weather heeeeey? Yea right, only literally. This is an ironic opening for a chapter that deals with things that are not so pleasant.
To help improve the meaning of these lyrics, visit “Moby-Dick (Chap. 35: The Mast-Head)” by Herman Melville and leave a comment on the lyrics box