Sooty, I'm sure you're right, I saw these boats quite a lot in Vernon in the 60s, and although the armament varied, according to role, I often saw them with practice fish, but never with tubes. Also, I think in times of hostilities, once enough fuel was used from the main tanks, and the fuel from upper deck tanks transferred, these tanks would have been jettisoned. Not certain, but!!
Anyway, What lovely boats!
Regards, Ken H.
I remember she, and her sistership Brave Borderer at Plymouth Navy Days, powering up and down the Tamar in spectular fashion, they sported 4 torpedoes as I remember, and no additional fuel tanks.
Great to watch, and if H & S had been around then, they woukld have had kittens.
The extra fuel tank's were constructed in a similiar way to aircraft fuel tank's in regard's to possible "Flak" damage I believe and as previously indicated were to be used first and then unshipped and pushed over the side. Nice photograph.