AR-VN3 M92-2, 60' MONITOR Mk1, 1968, 3/4"=1' $26.00
Reckon this is probably what you are looking for ED😉
From-
"VIETNAM RIVERINE BOATS

AR-VN1 PCF 94, 50' PCF, Mk1 (Swift Boat) 3/4"=1' scale $24.00
AR-VN2 82' POINT CLASS WPB, 1/2"=1' sacle $24.00
AR-VN3 M92-2, 60' MONITOR Mk1, 1968, 3/4"=1' $26.00
AR-VN4 PBR Mk2, 32' RIVER PATROL BOAT, 1967, 1"=1' scale $25.00
AR-VN5 PBR Mk1, 31' RIVER PATROL BOAT, 1966, 1"=1' scale $25.00"
Cheers, Doug😎

https://floatingdrydock.com/ptboat.htm

ttps://floatingdrydock.com/ptboat.htm

Hi Lew

Thanks, I had a 3 elevation drawing and I made a drawing for a RC model which I built and ran but it got smashed during a house move. Both drawings have disappeared over time. This type of thing happens when you change hemispheres.

Regards

Ed

I came up with several drawings by searching on Google using: Viet Nam era monitor. These were US Army's LCM-6, also know as "Mike boats". I've been on a LCM-5 which is slightly smaller. Interesting ride. Stops fast😮 when it hits the beach at full speed.

Lew
Florida , USA