In the poem Mooring what is simile and metaphor?

In the poem "Mooring" by Elizabeth Bishop, there are several instances of similes and metaphors.

Simile:

1. "My little craft, like some frail snail / Withdrawn into its shell"

Metaphor:

1. "So still the water is / It seems a mirror of the sky."

2. "You are the harbor where I moor / And you receive me, storms at an end."