https://qspace.library.queensu.ca/handle/1974/8298 The appendix contains sketches for multiple unbuilt Canadian warship designs from the late 1950s to the mid 60s, including General Purpose Frigate, DDG designs, Helicopter carrying destroyers (referred to as Heliporters), and also mentions attempts...
Didn't Ruler require an active sonar combined with Type 175?
Also what is the diagonal box on the side of B turret?
I've seen something similar on the 4 inch mountings of the Chilean Almirante class destroyers. Is it a rocket-flare launcher?
Within the above document, I found a sketch of the steam-powered FY67 DDG on page 257. This document also contains some sketches for a number of Project Seahawk designs.