The Uzo test was on a ship measured on map and RM as:-
Range = 2600m
Mastheight=27.1
ShipLength=147m
AOB=30deg
Pic1 - Find Range
Look at mast on ship and read
clicks - set inside middle ring to 4.1 at the top marker.
Read
mastheight from outer ring.
Read
range from outside middle ring.