Your Phone may be equipped with GPS, but sooner or later the cell phone lithium battery will die. After a disaster, it may be difficult to get a place to recharge.
Garmin GPS receiver uses aa batteries can be replaced so easily. All types of its top has a rating of IPX7, which means it can operate even if submerged. There are many types of options, including a touchscreen Oregon 450 or a conventional gpsmap 62s. You just select your preference.
