Multi-use fully restrained platforms

A fully restrained platform for ocean deployment comprising:

• a monopile driven into an seabed floor and extending vertically upward past a waterline;
• an interface piece including a cap mounted over a top portion of the monopile, the interface piece including a first plurality of interface receptacles;
• and
• a deck structure including a second plurality of mounting columns coupled to corresponding one of the first plurality of the interface receptacles of the interface piece.

A method of installing a fully restrained platform in a marine environment comprising:

• driving a monopile into an ocean floor;
• mounting an interface piece atop the monopile, the interface piece including a plurality of interface receptacles;
• installing a deck structure atop the interface piece via mating a plurality of mounting columns of the deck structure and the plurality of interface receptacles of the interface piece;
• and
• securing a payload atop the deck structure.