I think you need a bulk box of them! Sew one into each hammock so that hangers will always be able to achieve the perfect magnetically aligned hang for the perfect night's sleep!
For navigating...not so much. I have one of the little key chain Silva compasses and found it handy when navigating in cities for orienting myself coming out of underground / subway train stations. Sees less use now that I have a smart phone, but I still prefer to use a paper map and compass when walking in a city.
Having a compass in a tin seems like a waste of the compass 99.999% of the time.
For navigating...not so much. I have one of the little key chain Silva compasses and found it handy when navigating in cities for orienting myself coming out of underground / subway train stations. Sees less use now that I have a smart phone, but I still prefer to use a paper map and compass when walking in a city.
Having a compass in a tin seems like a waste of the compass 99.999% of the time.