Knife blade that an 80s/90s submariner would appreciate

Hey everyone, civilian here looking for some help in gifting a navy vet a custom-forged knife for the holidays. I would love for the blade's shape to be something that he will appreciate and maybe remember from his time in service. He was a submariner from the early 1980s to around Y2K, did submariners even carry knives? And if they did, did they just use their own utility tools instead? I thought a Ka-bar or mark 1 or 3 style blade with the clip point would be cool, but from my research it seems like combat knives were utilized by SEALs much more frequently than seamen - please let me know if this would be applicable to him or if knife blades really had no significant presence for submariners - thank you!!!