British Aircrew Mk7 Life Jacket
The Mk7 life jacket includes a square aperture on the right hand side just below the fluorescine sea marker pocket to allow a pressure-breathing waitcost to be connected through the jacket to the oxygen tube of J-Type or M-Type oxygen masks.
The Mk7 life jacket provided pockets for a SARBE (Transmitter Type T.10050) Mk1 or Mk2 beacon. The Mk2 battery unit was 1" smaller in depth than the Mk1 battery, and required a foam "making up piece" (Ref. No. 22C/2690) to be installed in the pocket. The beacon is stowed in the left hand pocet, and battery unit in the right.
(Note: The SARBE equipment is described in AP2554E Vol 1.). The lamp and battery are described in AP4343, Vol 1 and Vol 1 Book 3.)
RAF / RN Resources
AP1182E Vol 1, Section 2, Chapter 8, Fig 1, AL113 June 1965
AP1182E Vol 1, Section 2, Chapter 12, AL113 June 1965
Components of the Mk7 life jacket.
Quote:
Aircrew life jacket, Mk 7, consisting of:- Ref. No. 22C/2275 Waistcoat Ref. No. 22C/ Stole, complete with oral inflation valve Ref. No. 22C/ Cylinder, CO2, Mk 4, 34 gr Ref. No. 6D/9432080 Head, operating, Type M Ref. No. 6D/1624 Valve, oral inflation, Mk. 2 Ref. No. 22C/1429 S.A.R.B.E, Mk. 1, or S.A.R.B.E, Mk. 2 Ref. No. Draw rod (nylon) radio beacon stowage Ref. No. 22C/1862 Lamp, Type B Ref. No. 5A/4216 Fluorescine sea marker Ref. No. 22C/1185 Heliograph Ref. No. 27H/2107 Ground / Air emergency code Ref. No. 27H/2366 Whistle Ref. No. 22C/1186 Life line 250 lb Ref. No. 22C/1739
(Note: it is assumed that the items with missing or incomplete Ref. No.'s may have been recently introduced or modified and were awaiting new Ref. numbers at the time.)