Don’t bring any new equipment on this expedition that you have not already tested in the water and are very familiar with. The Polar Regions are not the place to test out new equipment. Please make sure that you have done at least 4 or 5 dives with your new equipment.
It is required that you complete a few dives with all the equipment you will be using before coming on the trip. This will also allow you to fine-tune your buoyancy and trim characteristics, and make a note of how much weight you will need when diving with all your equipment.