USA Twin 20 mm/70 AA with Mark 14 Gyro
gunsight
The mounting is probably a Mark 24
Click on this picture for a larger image
British version of the Oerlikon 20 mm/70
on Mark IIA Pedestal Mount
Note the eyepiece/ring sighting system;
this weapon depended entirely upon the gunner's shooting ability
Sketch from B.R. 224/45
British 20 mm/70 in Mark IIA Pedestal Mount
formerly on the Polish Destroyer Blyskawica
This weapon is now at the Exposition of
Navy Museum, Gdynia
Photograph copyrighted by Michal Kopacz
Another view of a British 20 mm, this one
on HMCS Prince Henry in a Mark VIIA mounting
Note the safety rail installation
Canada Department of National Defence
/ Library and Archives Canada Photograph e002852524
British 20 mm in Mark V twin mounting on
HMS Starling
IWM photograph A 22088
Post-war use of 20 mm Oerlikon gun manned
by the RAF in Aden
IWM photograph RAF-T 5155
Mark 15 Quad Mount
USN Photograph
USN 20 mm Mark 4 Oerlikon Diagram
USN Projectiles of World War II
Diagonal Stripes represents the
body and body walls, small dots represent the tracer elements, dense dots
represent the incendiary elements, other dots represent explosive (HE)
burster elements. Explosive, incendiary and tracer elements were
loaded in increments, as shown in the above sketches.
Cutaway views of 20 mm ammunition
Page History
28 May 2008 - Benchmark
16 January 2010 - Added picture of HMCS
Prince Henry
14 January 2011 - Added cutaway sketch
28 January 2012 - Redid picture of British
mounting at Gdynia
28 December 2013 - Added photographs of
HMS Starling and RAF gun