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Descent 305 - Pre-order is open!!
Our August/September issue has a publication date of 2 August, and it is a special summer bumper issue full of stories of exploration and wonder from the underground world.
Hi Rupert - you can use a rocket tube (army munition case) but be careful how you search in google. Whilst not consistent mine has been down to 20m and the content have been dry. Secret I think it to keep the lid only loosely opened when not is use as this does not compress the single oring.