If I were stranded in an island and I was only able to take two things I would most likely take my phone and a boat. The reasons why I would take my phone would be just in case I am able to contact someone and send for help i would have the opportunity to call or send a message to someone if i were in that situation. If I was able to do that i would use it to keep me sane while I wait for help. I would also take a boat that will be able to take me to the nearest island where hopefully I can find people or a way to get back home. Not having any type of transportation I wouldn't have a way to go out there and look for help and I would just be stuck in an island without an opportunity to go back home until someone comes to find me.