Abstract: A blackjack play option response indicator which presents the 350 card combinations and the appropriate play option response for each card combination, composed of two disk rotatably connected to each other. The back disk has thereon a plurality of radially arranged rows of play option response indicia, wherein "B" designates "blackjack"; "H" designates "hit"; "S" designates "stand"; "D" designates "double down"; and "SP" designates "split". There are 350 play option response indicia which correspond to the recommended play option responses uniquely corresponding to each and every one of the 350 card combinations possible in blackjack. Adjacent the perimeter of the back disk, dealer's up card value indicia are provided thereon. The front disk is provided with a view port in the form of, preferably, four radially arranged slots for being selectively aligned with the aforementioned play option response indicia.

Abstract: The platform comprises an annular truncated cone of concrete which constitutes the main resistant element of the platform and is designed to take the thrust of ice, and a cylindrical steel part housed inside the annular truncated cone. Watertight passages parallel to the generatrices of the cylindrical wall are provided to house piles in the peripheral ring, close to the wall. A watertight passage well is provided in the cylindrical steel part for the passage of the drill pipes. A circular running track is provided for gantry cranes used for piles handling. The platform has two drilling rigs placed on one half of the platform and able to work simultaneously.