Number of years steadily employed? Since 1959: 51 then.

Number of years happily married? Since 06 October 1973.

Academic credits earned? 210 undergraduate hours, about 90 graduate, as well as certifications in various areas from various universities, etc.

Sea miles successfully transited? More than a few! And I'm talking blue water! I also have transited more than a few miles of inland waterways, including the Great Lakes and the St. Lawrence Seaway.

Shipboard fires extinguished? None, thank goodness. I not to let one start.

Underwater miles traverses successfully? Swimming or aboard an underwater craft? Does shipping on a ship but having the cabin belong the waterline count as above or under water?

Technical documents produced? Sorry, but I lost count a long time ago.
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Now, let's see:

Number of presidencies of national organizations held?

Number of time you were an invited speaker at a major European university?

Number of rounds fired in anger?

Number of rounds fired in practice?

Awards and decorations held (US or foreign)?

Number of bridges blown up?

Proficiency (scale of 0 to 10) with a) foil b) epee c) saber d) longsword e) quarterstaff f) rapier g) rapier and dagger or cloak h) a case of rapiers?

Typing or keyboarding speed?

Number of native Unix systems maintained?