Survival at Sea Game

We were given a situation:  our boat had sunk and were were in a life raft.  We have fifteen items that are salvageable that we have to rank from most important to least important.

Here is my prioritized list:

1. water
2. radio
3. rations
4. chocolate
5. rope
6. fishing kit
7. mirror
8. mosquito netting
9. opaque plastic sheeting
10. sextant
11. petrol/oil mixture
12. shark repellent
13. rum
14. floating seat cushion
15. map of North Atlantic

My top two choices are water and the radio as all humans need water and the radio could be used to broadcast and receive messages.

I had a hard time determining whether or not petrol would be of any use to us and decided that over all it was not but potentially had some uses in the long run for instance boiling water.

My group only ranked a few things similarly.  The only true similarity was that water and food was at the top or near the top of the list.

My choices were similar to the official choices but the official list had the mirror first and the petrol/oil mix second and then water.  My list has water first and then radio and then food.  They seem to think that the mirror and petrol are most important for the use of signaling and although I have similar ideas with them I decided that sustenance is more important in a survival situation.