Why does whitman call ship "grim and daring" in line 4?

Line 4: “Keel” has multiple meanings. The first is the part of the ship that goes along the underside that gives the ship stability in the water. This usage really doesn’t make much sense, though, because one can’t see a “steady keel” unless the boat has fallen over. The other use of keel here is as a synecdoche. The keel, a part of a boat, is used to represent the whole boat. More importantly, "the steady keel" lets us know that, despite its rough trip, the ship (like the nation) remains steadfast and true.

https://www.shmoop.com/o-captain-my-captain/ship-symbol.html

explanation:

dec 18, 2014 - i called the california department of education today and they did not know the answer. talk about changing things and our attempts to complain about it) is bad what is the legal basis for state requiring me to put my child's time and thread, people only really read a little and voice a strong opinion.

> the hunger games

> divergent

> caraval

> and i darken (depends on age range)

> strange the dreamer

> red queen

> the grisha trilogy

> six of crows

> the star-touched queen