I'm Going To Falklands, South Georgia And Antartica, 19 Days

I'm going to Falklands, South Georgia and Antartica, 19 days over the Christmas period. Small ship,190 passengers. I'm 71, fit and slim. I can expect very rough seas as Drake's Passage part of trip. Can I remove patch and re use if weather rough. How does the drug release into the system, only with heat of the body? If I kept it cool when opened will it still work when re applied. Might seem silly question but an expensive product to use every day for possibly 19 days when not always needed. Thank you for your trouble. Kate Saxton.