US VASS ASW bombsight

[WATU]

I have a c47 page report from NDRC on the US designed VASS low level bombsight for submarine attacks. It was still in development with just a few prototypes in existence. It is not stabilised and just has a single tube bubble level (similar to the British hand held Mk I but more sophisticated). It is very trigonometry heavy. The report is dated 12 November 1942 and copy was in British hands the following January.
Anyone know the subsequent history of the sight? Was it adopted and used operationally by the US? Britain did not use it.

 

[ThomasP]

VASS (Vosseller Anti-Submarine Sight) aka USN Bomb Sight Mk 20.

In my notes I have it listed as no service during the war, but saw limited service in the late-1940s and Korean War period.

 

[WATU]

VASS (Vosseller Anti-Submarine Sight) aka USN Bomb Sight Mk 20.

In my notes I have it listed as no service during the war, but saw limited service in the late-1940s and Korean War period.

Thanks. I have seen the name Vosseller but had not tied it to VASS. I wonder why it too so long to be developed and deployed?

 

[WATU]

I don't believe in second sight but... The next document I read after ThomasP's answer above, a document already in my possession, was an extract from the US Bureau of Ordnance history. It can be found on Hyperwar at HyperWar: US Navy Bureau of Ordnance in World War II.
Pages 354 onwards give a brief history of US bombsights in WW2 including the VASS and the Mk 23. Helpful and interesting stuff.