1.What are the images in this poem?2.What is the theme of this poem?

1.What are the images in this poem?2.What is the theme of this poem?
The grey sea and the long black land;\x0b
And the yellow half-moon large and low;\x0b
And the startled little waves that leap\x0bIn fiery ringlets from their sleep,\x0b
As I gain the cove with pushing prow,\x0b
And quench its speed i' the slushy sand.\x0b
Then a mile of warm sea-scented beach;\x0b
Three fields to cross till a farm appears;\x0b
A tap at the pane,the quick sharp scratch\x0bAnd blue spurt of a lighted match,\x0b
And a voice less loud,
through its joys and fears,
\x0bThan the two hearts beating each to each!
提问：
1.What are the images in this poem?
2.What is the theme of this poem?