Works fine without the cellular, just might take longer if you have traveled far since the last time you used the GPS. Other than ' assisting' the GPS with the initial startup and giving it a clue where you are to speed up locating you. The iPads with built in CELLULAR all have true multichannel GPS chips in them and the cellular has nothing to do with the GPS. There is much confusion about 'assisted GPS' and GPSA. Now I know what chip I need to get for the EC! For fishing brushpiles when the boat is barely moving along, the S model is better for finding my brushpile waypoints.This is a good thread. I've found myself walking in a big circle for a few moments until the GPS can tell which way is what.However, IN FACT I find the S model is LESS reliable than the regular, non-compass model!One friend found himself paddling upstream because his unit lost its calibration.For paddling, I won't have a S model. If it is moving, it knows what way is north.So if you are standing still and don't have a S model, the GPS can't tell you which way is which. I have a Map76 and a Map76s, The difference being the sensors (S), ie the compass.You don't need the compass feature if the gps is moving. I'm still in the dark ages with the 76 models. Are the compass and barometer worth $149? Are there other features I'm missing that would help justify the cost difference?Are there other handheld GPSs I should be looking at instead of these? Durability and price are primary concerns. My last GPS had the compass so I don't know how much different the functionality would be without it. Seems the main feature differences are the compass and barometer. Thanks for that I appreciate the effort you have gone to to help us electronic numphtys.West Marine currently has the Garmin GPSMAP 78 on sale for $199 and the Garmin GPSMAP 78SC on sale for $349. I have printed of this lot of instructions as my 12 yr old Navman is sure to crap itself sooner rather than later and GARMIN will be my choice of unit. img file as a Garmin drive and automatically load the more detailed G2 map when managing your marks. Home Port should automatically recognise the. img file still mounted (shows in the left window of finder) open up the HomePort application. ![]() img file named Garmin, open it then copy and paste the GMAPSUPP.IMG file into the Garmin folder. img file will make it come bold and it should show like an SD drive does in finder.ġ0. If it doesn't show up, it means it isn't "mounted" and double clicking on the. The new image file should show up in the list with the eject symbol to the right of it. Once complete close down Disk Utility and reopen Finder. Click on the size and go to custom and resize the image to the vicinity of 1.1GB.ĩ. Rename the Image something Like "Garmin G2 Australia and NZ" in Save As.Ħ. Once open up the top of the screen in the centre click "New Image".Ĥ. Go to Applications-Utilities- Disk Utility. img file is what we are working with (just under 1GB in size)ģ. Of course double check that the little locking slider on the side is unlocked before you go purchasing another SD card reader Insert Garmin G2 Card into your machine and open up the folder "Garmin" and copy the file named GMAPSUPP.IMG to a new folder on your desk top.Ģ: Remove G2 Card you won't need it for the rest of the map install as the above. ![]() ![]() *Note* If your SD card reader in your machine is showing "Read Only" on your SD card when you get info in Finder then you need to purchase a second SD card reader as the Mac's SD card reader is faulty. This is only for Mac and has worked for me. OK so i thought it best to do a quick write up in case others fall into the same trap because I think it's pretty important that if you are taking the time to plan trips and actively manage your marks then you have to be looking at the more accurate G2 chart not the built in world map that had no detail at all.
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