This pen writes UNDERWATER

[woodPixel]

470736

[Optimark]

I thought you were talking about a Fisher Space Pen; these do write underwater.

I've been using one to write under water for quite some time, maybe around 15-18 years.

SpacePen.com (https://www.spacepen.com/)

Mick.

Ps: I do like the caption though, very well thought out.