What does it mean - "up she rises"?
I´m trying to explain this to my child....

Imagine, if you will, a sailing ship of days past. In the heyday of these ships, before electricity and motors could do all the work, getting anywhere relied solely on the labour of the sailors on board. Anything as simple as adjusting a sail or raising the anchor required the presence of half the ship's crew on deck, walking around the capstan1or hauling on halyards.

As the sailors walked around the capstan in order to raise or lower heavy sails or one of the ship's anchors, they would stamp their feet in time to a shanty sung out by the shantyman. Perhaps the most famous capstan shanty known to the general public is the 'Drunken Sailor'

http://www.bbc.co.uk/dna/h2g2/A4282553

Also

Stamp-'n'-Go Shanties: were used only on ships with large crews. Many hands would take hold of a line with their backs to the fall (where the line reaches the deck from aloft) and march away along the deck singing and stamping out the rhythm. Alternatively, with a larger number of men, they would create a loop -- marching along with the line, letting go at the 'end' of the loop and marching back to the 'top' of the loop to take hold again for another trip. These songs tend to have longer choruses similar to capstan shanties. Examples: "Drunken Sailor", "Roll the Old Chariot". Stan Hugill, in his Shanties from the Seven Seas writes: "(Drunken Sailor) is a typical example of the stamp-'n'-go song or walkaway or runaway shanty, and was the only type of work-song allowed in the King's Navee (sic). It was popular in ships with big crews when at halyards; the crowd would seize the fall and stamp the sail up. Sometimes when hauling a heavy boat up the falls would be 'married' and both hauled on at the same time as the hands stamped away singing this rousing tune."
http://en.wikipedia.org/wiki/Sea_shanty