Not content with just aircraft carriers, the Royal Naval Air Service is conducting “float off” trials with Submarine E22 and two Sopwith Schneider seaplanes. E22 went out to sea and then submerged, allowing the seaplanes to float off. The first experiment was a failure as choppy seas wrecked the aircraft. However today, the aircraft were successfully floated off and then flown back to the seaplane base at Felixstowe.
It’s not clear how practical this arrangement can be as obviously the submarine cannot submerge with the aircraft.