[CapnScurvy]

John D, as I remember there is not a keyboard function available to start/stop the clock (the game calls it a Chronometer.....those silly Europeanians....in America we would call it a Stop Watch). There is a keyboard key for making it appear. Some mods use the stock "X" key, OTC uses the "C" key.

You start/stop the Stop Watch by mouse clicking the "Stem" at the top of the watch. No other way to do it. There is no "Command" that I know of for starting/stopping the watch.

One word of caution, when you restart the watch by mouse clicking the stem, the watch will revert back to zero. A better way of stopping the time is to "Pause" the game. The only problem with that is if you ran the watch to a specific elapsed time while at the Periscope Station, then wanted to go to the Navigation Map, you won't be able to because the game is paused. You can do one of two things, either un-pause the game, strike the Nav Map station button to go to the map, then pause the game again (losing only a second or two). Or, let the watch get to a time just before you want to mark/stop the watch, shift to the Navigation Map, then pause the game. While paused, you'll find you have the ability to use all of the Map Tools available to plot or whatever, yet still have your stop watch available to march on when you wish to restart.

The game developers did realize that you're trying to do several things all at once, with only one person doing them (unlike in real life, you'd have a full crew). So, the Nav Map, and the other Stations, can be used with the game paused. Doing tasks that normally would have been done by several other crew members simultaneously.