Fisher space pens
Fisher Space Pens were famously developed for NASA in the 1960s for use on space flights.
Unlike ordinary ball pens, which rely on gravity to write, the space pen refill is sealed and pressurized. This enables the refill to write dependably under extreme conditions; it will write at any angle, even upside down; it will write in extreme cold of -50c upto extreme heat of +200c and it will write on most surfaces, including wet paper, film, metal and glass.
They are also used by the Jacques Cousteau Society to write underwater, on wet surfaces and in damp conditions.
Perfect for all scuba dive log use, they are the ultimate in writing technology. Also, if you choose to use our Rite In The Rain paper upgrade with your logs then they are highly recommended to ensure skip free writing.