The Native was my first Spyderco knife. I also own the Calypso Jr. Lightweight and the BF Native.
For all-around utility, it's hard to beat the Native. It has many features that the Calypso Jr. lacks. First, it has more grabbing options for the handle. You can grab it normally, or use the deep finger coil for better cutting control. It is a great stabbing tool, which is reinforced by the hollow ground and spear-point shape. The flat grind of the Calypso Jr., however, is designed for precision-cutting tasks, and I would hesitate to use it in a more aggressive environment. It's steel might be a better cutter overall, but one can hardly argue that CPM-440V is much worse at this task. It is considered a superior steel overall.
I tend to use my Calypso Jr. only for precision cutting chores. My Native, however, I prefer to carry everywhere and throw everything at it, and it never lets me down.
For your purposes, I highly recommend the Native over the Calypso Jr. I'm sure it will be much handier for boat and other utility tasks. Matter of fact, get both, but Native is best overall IMHO. Great knife for the money. You might want to consider getting the black G-10 version that Sal is putting up for sale soon in limited quantities. This handle material is considered superior for gripping and overall utility purposes.
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Hermes :"The Applegate Fairbarn is not bad...but for both offense and defense, the Randall 14 is good."
Hermes: "I'll take the Joe Kious for a friend."
Knife Seller: "Excellent choice."