Lake, Sea, Ocean, River

The airplane departed RAF Kirmington at 1755LT to lay mines in the French coastal waters. It failed to return to base and is believed to have crashed somewhere into the Bay of Biscay. Lost without trace.
Crew:
F/Sgt John James Perry, pilot,
F/Sgt Hugh Laurence John Mackender, navigator,
Sgt John George Duncan, observer,
Sgt Alan Harvey Clayton, wireless operator,
Sgt Francis Ferguson, air gunner.

The airplane departed Honiara-Henderson Field on a flight to Luganville, Vanuatu. En route, the crew encountered poor weather conditions with thunderstorm activity. The airplane went out of control and crashed into the Coral Sea some 520 km southwest of Guadalcanal Island. All seven crew members were killed.
Crew:
Cpt Walter L. Callaham,
1st Lt William R. McNeese,
2nd Lt Leonard M. Feldman,
2nd Lt Samuel R. Hufstedler Jr.,
S/Sgt Frank L. House,
Pfc Richard Gray,
Pfc John E. Lawler.

En route from Tunis to Castelvetrano, Sicily, the three-engine airplane was shot down by enemy fire and crashed into the Mediterranean Sea. All four crew members were killed.

The twin engine airplane departed RAF Llandwrog, near Caernarfon, at 0124LT on a night training exercise to RAF Penrhos. The crew contacted ground at 0132LT and this was the last radio contact ever. It seems that the aircraft went out of control and crashed into the sea while approaching RAF Penrhos. No trace of the aircraft nor the crew was ever found.
Crew (9th AFU):
Sgt Trevor Morgan Blakemore, pilot,
P/O Keith Charman, navigator,
Sgt John George Cairns,
Sgt John Mallett,
Lac Ronald Adam Simpson.

Crashed in unknown circumstances into the Mediterranean Sea off the Italian coast. All three crew members were killed.

The crew departed RAF West Freugh on a navigation exercise. For unknown reasons, the pilot was forced to ditch the airplane in the Firth of Clyde, off Prestwick. All four crew members were rescued while the aircraft sank and was lost.
Crew:
Lac R. K. Somervaille +3.

The seaplane was returning to RAF Mount Batten from Gibraltar, carrying 10 crew members and five passengers. It approached the flare path near RAF Mount Batten but overshot in the heavy fog and had to climb and circle to starboard before attempting another approach. The airplane continued to starboard and as it made a second approach in almost zero visibility suddenly crashed into the sea approximately 3 km from the breakwater lighthouse. The aircraft hit the water with the starboard wing down, turn on its back and broke in two. All five passengers were killed and the 10 crew members were rescued 90 minutes later.
Crew:
F/Lt Wynton P. Thorpe, pilot,
P/O R. P. Gray, pilot,
F/O F. J. Lees, pilot,
P/O William S. Moore, navigator,
Cpl D. E. Bennington, fitter,
Cpl D. L. Graham, rigger,
Sgt R. B. Wilkinson, wireless operator,
Sgt S. J. Smith, wireless operator,
LAC P. Stanton, armourer,
Sgt D. G. Keating, air gunner.
Passengers :
Brig W. Vogel,
Cpt G. W. Wadham,
Cpt Frederic Thornton Peters,
Cdr R. R. Devlin,
Sgt Ryall Edward Cordrey, air gunner.

The airplane was engaged in a training exercise on Lake Washington, carrying nine crew members. The instructor was in process of giving a check flight to a student pilot who was supposed to perform instrument landings. Maneuver were completed close to shore to keep sufficient distance with another Catalina also landing nearby. The pilot under supervision was listening to his radio, waiting for a landing clearance. This allowed him to be distracted, causing the airplane to change attitude (maybe due to rough air or a sudden application of controls). The instructor took over control of the airplane, but apparently overcontrolled, causing the airplane to roll to the left before hitting trees and crashing against hilly terrain overlooking Lake Washington.
Crew (VP-FAW-6):
Lt William R. Stevens, pilot,
Ens William C. Davis, pilot, †
Ens G. T. Anderson,
Ens Q. M. Bergh,
Amm3c W. A. Blue,
Amm3c A. L. McClean,
Amm3c W. A. Morey,
Rm3c G. D. Collett,
Sea2c C. W. Clifton.

The airplane departed Espíritu Santo on a flight to Honiara, carrying four crew members and one passenger who was a US Navy corpsman attached to MAG-25. While descending to Henderson Field, the pilot encountered very bad weather conditions. In heavy rain falls, the airplane went out of control and crashed into the sea. No trace of the airplane nor its crew was found.
Crew:
1st Lt Joseph Napoleon Abel, pilot,
S/Sgt Arthur Freeman Dowers Jr., copilot,
Cpl Roman John Freise, mechanic,
Pfc John Robert Matuszak, radio operator.
Passenger:
PhM3c Paul Adolphus Westerman.

The airplane departed RAF Great Massingham at 1554LT on an Air Sea Rescue operation, searching for a missing Mosquito raid on Vlissingen. The airplane failed to return to base and is believed to have crashed somewhere into the North Sea. Lost without trace.
Crew.
F/O Francis Charles Hammond, pilot,
Sgt Charles McCreedy,
F/Sgt Kenneth Elwood Stilborn,
Sgt George Tough.