Coordinated, complementary water environment mobile robots

A two-part, selectively dockable robotic system providing counterbalanced stabilization during performance of an operation on an underwater target structure, comprising:

• a first underwater robotic vehicle sized and shaped to at least partially surround the underwater target structure;
• a second underwater robotic vehicle sized and shaped to at least partially surround the underwater target structure and be at least partially orientated in a position opposite the first underwater robotic vehicle;
• complementary docking mechanisms supported by the first and second underwater robotic vehicles and arranged so the first and second underwater robotic vehicles can selectively couple to each other with the underwater target structure disposed at least partially between the first and second underwater robotic vehicles;
• a tool that exerts a first force against the underwater target structure in a first direction, the tool being supported by one of the first and second underwater robotic vehicles;
• and
• a stabilization module that exerts a second force against the underwater target structure in a second direction to at least partially counteract the first force, the stabilization module being supported by the other of the first and second underwater robotic vehicles.