A chronograph is a type of watch that includes a built-in stopwatch function, allowing users to measure elapsed time. It typically features separate sub-dials to track seconds, minutes, and hours independently from the main timekeeping function. Chronographs are popular among athletes, pilots, and individuals who require precise timing capabilities.
You can go to an airsoft field and use a cronograph, a device that measures the FPS of the bb's. In a pinch you can also shoot a soda can at 5 feet, it should pierce the front side but not the back in order to be safe and fun.
A chronograph watch is a timepiece that has additional stopwatch functions on top of the regular timekeeping capabilities. These functions allow the wearer to track elapsed time for specific tasks or events, making it a popular choice for timing sports activities or measuring intervals.
Typical harnesses if made by BT, Tippmann, Spec Ops, or NXe are worn over the shoulders. These harnesses should fit similar to a backpack and should cover the majority of your backside. In the front of your body should be straps, typicall containing an assortment of pockets to put tools, lube, and cronograph. Other harnesses typically used to speed ball are worn around your hips. The straps will fit across your stomach. Keep in mind that the pods (that hold the paintball) should be upside down. This is allows the pod to fall into your hand during the play of game, which in turn allows one to reload faster.
In season 8 of NCIS, when this question was originally asked, Gibbs wore an OMEGA PLOPROF Seamaster. The Omega Seamaster PloProf has a very distinctive (some say "funky") case with a fully enclosed crown. It's a chronometer (not chronograph) and the currently produced version, released in 2009, is rated to 1200 meters. The PloProf was the first watch by any manufacturer which was specifically designed for professional divers. The original PloProf (from the French "PLOngeur PROFessionnel" meaning Professional Diver) was designed by Omega in cooperation with early professional diving company Comex and Jacques Cousteau. It was released in 1970 and was rated to 600 meters. In more recent episodes, including the last cemetery scene in season 9, episode 9 "Engaged, Part 2", Gibbs wears an orange-bezel stainless steel Omega Seamaster Planet Ocean Cronograph (Omega model number 232.30.46.51.01.002). This watch uses an Omega Calibre 9300 movement with two subdials including a small second hand. Omega also currently makes a very similar looking Planet Ocean Seamaster (Omega model number 2218.50.00) with three subdials rather than two and the date at the 4:30 position rather than 6 o'clock. This one uses an Omega Calibre 3313 movement. The watch in season 9, episode 9 is clearly the 232.30... version however. Both watches are chronographs and are rated to 600 meters. One does wonder how someone on an NCIS senior agent salary affords a watch that generally sells for between six and seven thousand dollars. Then again, he doesn't spend much on anything else. The PloProf is worth about a thousand dollars more still than the Planet Ocean chronographs. If the character is supposed to have collected both watches, you have to think he really likes Omegas. More likely Mark Harmon is fond of them, or the Swatch folks who import Omega into the US are hard at work on product placement.