Hi Brian,
The sources are varied: the best place to start is 'Lloyds Shipping Losses of WW2', a 2 volume set detailing all known ship loss and damage for whatever reason. Rare book and expensive if you can find a copy. Jordan's Merchant Ship Fleets 1939 is another good source of info, but tends to repeat the basic data in Lloyds when it comes to losses.
I combine these with data from Australian government sources such as shipping reports, cablegrams, survivor notifications, convoy reports, overseas orders and re-orders (they often give the reason for re-ordering) for munitions and the like. No one source provides a complete picture, but it is not a bad start.
Alas, my concentration on Australia relevant data means I have little on items not going from or to Australia, so nothing on the radar sets you refer to.
Mike C
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