Now let's consider those situations where you either 1) can't reach your fixed blade for whatever reason, or 2) you've lost it, or 3) it's broken. THAT is why you have the SOG Trident in a pocket. With nearly the same blade shape as the SOG SEAL Pup, the Trident's 3.75-inch blade is sufficient for most field chores. Its assisted-opening feature makes it quick and easy to bring to play with one hand. Its deep pocket carry makes it unobtrusive if you're in a more populated or politically sensitive area. And I especially like--though I really didn't use to--the "safety" that is incorporated into the Trident. Because of the ease with which it can be opened, and because SOG wants to make sure that it isn't opened accidentally--even just by you moving around and something hitting it in your pocket--the safety can be engaged to lock the blade shut. The Trident's handles are textured almost identically to the SOG SEAL Pup, providing that same level of secure grip.
If you take a look at the names of the two knives, it's easy to figure out why SOG went out of the way to design a decent grip into their handles. "Trident"--the classic symbol of Neptune and part of the SEAL crest. SEAL...well, if you don't know, I ain't tellin'.
I like them both and recommend them as a pair. Again, I like the SOG SEAL Pup Elite more for field work than potential combat work, but the blade is long enough to serve. Check out more information about either and the rest of SOG's line by visiting SOG's website.