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C/T 21 - information sought

Printed From: BMPT Forum
Category: Boats (In alphabetical order)
Forum Name: Control Target Boats
Forum Description: Discussion on Control Target Boats
Printed Date: 22 September 2020 at 2:24pm

Topic: C/T 21 - information sought
Posted By: Ness Battery
Subject: C/T 21 - information sought
Date Posted: 26 February 2018 at 11:22am
Greetings all...

I'm hoping to identify a vessel shown in a photograph taken in Scapa Flow c. 1945. 

The photograph shows a boat alongside the pier at Houton, where there was a boom defence camp. A boom ran from near Houton across to Scad Head, guarding the western entrance to the 'Flow. Boom floats are visible on the shore.

The only information I have on the Houton Pier image is what's written on the back:

"HSTB alongside Houghton [sic] Pier"

I've chosen to post this in this part of the forum because the boat seems to bear close resemblance to images of C/T 17 posted in this forum -" rel="nofollow - see post by gordonrasmith 

This boat may well have been one of several based at Houton and assigned to patrolling the boom defences.

Furthermore, another image I have shows C/T 21 alongside HMS Iron Duke - again, similar to the boat at Houton Pier and C/T-17. This image is taken from ADM 116/5790 - apologies for lower quality, not my own work!

There would have been no shortage of work for C/T's in Scapa, not least from the many coast batteries around Orkney. There were R/C boats around, often operating out of Stromness into Hoy Sound.

Can anyone comment on the identity and origins of these two vessels? Thanks!


Posted By: Christian
Date Posted: 01 March 2018 at 12:55pm
C/T 21 was built as RAF HSL 115, a British Power Boat Co 64ft HSL 100 Class High Speed Launch converted to Control Target and reclassified C/T 21 in 1943." rel="nofollow -


Posted By: Ness Battery
Date Posted: 01 March 2018 at 2:27pm
Great, thanks. Very useful!
Any idea on the ID of the boat alongside pier?

Posted By: Christian
Date Posted: 02 March 2018 at 9:30am
Same class, most likely same boat

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