ENGINEERS CLINOMETER, 1940's

Used by engineers for checking gradients on structures.

Your comments:

• Also used a lot on warships for weapon alignment. At build a reference datum was welded on the keel. readings from this could then be transferred to ensure that all guns and radars were aligned to the same common horizontal datum.
  .......... John Walley, Newcastle upon Tyne, 11th of October 2020
  
  

A0275