The barometer is "nice to have". The compass is non-negotiable. It is extremely useful once you get used to remembering that you have one. Example: you have arr

The barometer is "nice to have". The compass is non-negotiable. It is extremely useful once you get used to remembering that you have one. Example: you have arrived at a train station in a new city. You have planned your route - you need to catch a bus from a stop on the west side of the station. You alight on the platform and there are multiple exits - you are completely disoriented. Turn left or right?