Interior mount steerable jet drive

A multi-jet drive for marine vessels, comprising:

• an impeller mounted within the hull of the vessel, which impeller can be activated to draw in water from ambient water surrounding the hull of the vessel and expel said water in a forceful stream;
• a controllable rotatable jet nozzle receiving the forceful stream from the impeller and directing it selectively through at least one of a plurality of fixed jet tubes mounted within the hull of the vessel, which jet tubes are in fluid communication with said ambient water surrounding the hull of the vessel;
• and
• a control mechanism for activating said impeller and controlling said rotatable jet nozzle so as to direct said stream selectively through at least one of said plurality of fixed jet tubes;
• and
• wherein at least one of:
• said impeller is a variable speed impeller, wherein said speed is controlled by said control mechanism,
• said apparatus further comprises two exterior mounting plates, one positioned on the port side of the vessel and the other positioned on the starboard side of the vessel, wherein each of said mounting plates has two jet tube ports, and
• each jet tube is provided, at a jet tube port thereof, with pressure unlocking flaps that are spring biased to the closed position so as to block the port when it is not in use but will be opened by the pressure of water flowing through the port when in use, thereby serve to diminish drag while the vessel is underway.