Device

Now, that pic appears to show the window without the device fitted but the cut-out has been blanked off with a transparent panel.

This looks exactly like the window we have for FA.

A friend who worked for the OSFU (later than the Twin Pin era) has confirmed there was a tracking device mounted in the window of surveyor aircraft. This was for following the designated track accurately for the photo-pass.

It would be nice to obtain an original tracking scope (or whatever it is) to mount in the cockpit section for display purposes.

The Twin Pin went down well at the Newark Cockpit Fest (see thread in Historic for pics).

Thanks for posting the pic, VeeOne.

Anon.