Wearable video recording

GoPro, but there are also knock-offs available for far less. Same form, fit and function. Also there's a Contour video camera that looks more like a torpedo with pretty good performance

I used a GoPro with head harness with no problem on the AquaDuck on the Disney Fantasy. I'm sure it would work equally well for ziplining (with the harness over/under your helmet, as may be required by the tour operator, for safety). You could also use a chest or wrist harness.

I now only take my GoPro and phone for my camera duties now.

i use the GoPro for most activities .

Assuming that you will be zip lining on the cruise ship, as some of the bigger ships will now allow you to do, I would check with the cruise line first to see if they even allow it.

If possible and you plan on zip lining on an excursion, I would see if I could figure out if the use of recording devices is even allowed. Better to be safe than sorry!

There are innumerable GoPro accessories available that are specifially for wearing.

For the Camera itself, GoPro Hero 4's and 5's are available on Amazon for a Fairly reasonable price, even better prices are out there if you dont mind reconditioned. The housings and other camera-specific accessories are the same for Hero 5/6/7, and hero 3/4.

There are other action cameras on the market, similar in size to the GoPro, that use the same mounts. I personally run 2 Hero 5 Black, and a R7 Replay 1080p

Right on.

Whenever I'm doing activities that require a wearable I use a GoPro with the headband strap thing. Works well for me!