Aviation Pens & Flight Planning Writing Pads

A Fisher Space Pen uses a sealed cartridge pressurized with nitrogen, typically around 35 to 45 PSI, to push thixotropic ink toward a tungsten carbide ball. Because the ink is forced out under pressure instead of pulled by gravity, the pen writes at any angle, upside down, over grease, and even underwater.

Yes. Fisher Space Pens have flown on crewed spaceflights since Apollo 7 and remain in use because their pressurized cartridge feeds ink in zero gravity, where a conventional gravity-fed ballpoint will not write. The same pressurized design is what makes the pen so dependable in a cockpit on Earth.

Pilots use pressurized pens because cockpit writing rarely happens on a flat desk. You may be holding a kneeboard at an angle, writing against the panel, or flying in a cold, high cabin. A pressurized pen feeds ink under any orientation and across a wide temperature range, so a clearance or frequency never goes unrecorded.

Not reliably. A standard ballpoint relies on gravity to feed ink, so it can skip when held at an angle and may struggle or freeze in the cold, low-pressure environment of a high cabin. A pressurized pen avoids the issue entirely, which is why many pilots carry one as a backup at altitude.

The Skilcraft B3 Aviator is a multifunction pen widely issued to U.S. military personnel, including aviators. It combines black ink, red ink, and a pencil in a single barrel and is sized to fit the pen slots on a flight suit, making it a practical choice for pilots who annotate charts in more than one color.

The pressurized cartridge in a Fisher Space Pen is rated to write across roughly -30F to +250F, far wider than a conventional ballpoint. That range covers the cold of a high, unheated cabin and the heat of a sun-baked ramp, so the pen keeps writing where ordinary pens skip or freeze.