USS Monadnock (BM-3) at sea between San Francisco, CA, and Manila, Philippine Islands, circa June 23 to August 16, 1898. She was one of only two U.S. Navy monitors ever to make the crossing. She was ordered to join George Dewey's Asiatic fleet in the Philippines during the Spanish-American War. While she never turned to the continental US, she protected US interests during the Boxer rebellion and patrol the rivers of China. She served her twilight years as a submarine chaser before being scrapped in 1923.
Photographed from USS Nero (AC-17), her escort on the trans-Pacific voyage.
Note: the amount of water over top of the main deck. While a ship will stay afloat as the main interior body stays dry, that doesn't mean it makes a good sea going vessel. Monitors as design have shallower hulls to make them a smaller target to the enemy, the trade off is they are only really suited for rivers and coastal areas.
NHHC: NH 45956, NH 60659