The USS Moctobi (ATF-105), now called "Lion", and USS Quapaw (ATF-110), now called "Tiger", are US Navy salvage ship aka Fleet ocean tugs (ATF).
An ATF's duties is to provide towing, salvage and at times rescue operations for the fleet. Those are basically tow boats for disabled navy ships.
Those two tugs are decommissioned and are now docked at the Richmond Kaiser Naval Shipyard (near San Francisco), awaiting either refit or scrapping.
The Kaiser Shipyard in Richmond (California). aka "Richmond Shipyard Number Three" is one of the several abandoned Naval Shipyard in the San Francisco Bay area.
It now belongs to the city of Richmond and is now part of the National Park Service's Rosie the Riveter--World War II Home Front National Historical Park.
This is a No-Trespassing Area, enter at your own risks!
For more information about this place, please read the following Wikipedia articles:
For more information about the Rosie the Riveter World War II Home Front Memorial Park, go to www.rosietheriveter.org/ .