Catalogue description papers incl history of hydrophone development at Portland, with photographs rel to HMS...

Details of RNM 2009/111

Reference:	RNM 2009/111 (click here to view this record in archive's external catalogue)
Description:	papers incl history of hydrophone development at Portland, with photographs rel to HMS Vernon
Date:	1917-1919
Held by:	National Museum of the Royal Navy, not available at The National Archives
Other reference:	See Annual Return 2009

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