How about a Mercator German Sailor's Knife?
Image from worldknives.com
I believe most sailor's knives come with a sheepsfoot blade and a marlin spike.
And a combo marlin spike kinife with a blade and marlin spike in the same frame are pretty much useless for serious work.
This from a thread titled "Marlin Spike Knife"
"While the combination Marlin Spike Knife knives talked about in this thread look good, they are pretty much impractical.
Think about it. There you are using the marlin spike portion of the tool and all of a sudden you need the knife portion to cut or trim the line. Whadda ya gonna do? Pull the marlin spike out of your line and lose all progress made using the marlin spike in order to use the knife end? A lotta guys/gals that do a lot of line/rope work run into that problem shortly after they get their shiny new tools and end up buying another knife to use along side their marlin spike knives.
Most Bosun's Mates in the Navy carry a stand-alone knife and a separate stand-alone marlin spike. So do other ratings that are also involved with rope/line work in their ratings (jobs). Even sailors that have nothing to do with working with line/rope carry marlin spikes that are separate from their knives. It's kinda a Navy thing.
These are my knife and marlin spike I carried while in the Navy. Both separate tools. A combo tool would have been pretty much useless.
Some Bosun's Mates (especially those old salty ones) carry a knife, a marlin spike, and a fid in a scabbard that hangs off their belts. They'd use their marlin spikes, which are made of steel, to work wire rope and cable and their fids, which are made of wood, to work their hemp or nylon line and ropes.
More than one of those combo marlin spike knives have gone over the side after a frustrated sailor had to undo his/her work in order to trim the line they were working on.
I hope I haven't gone too far astray. Seeing those Marlin Spike Knives brought back a bunch of memories.
Oh, if ever aboard a U.S. Navy vessel, ask to see their Bosun's Locker. You'll likely see marlin spikes and fids up to three feet long and maybe even longer on some ships."