| | Re: Garmin 2210/3210 Loran line question
I do not see any way to show the loran grid on the unit as per the online manual on garmin's website. It would be very hard to develop a program that could do that seamlessly I would think, and if so the unit would be even slower....
You can certainly display loran info that the unit can convert from GPS to approximate loran C TD's. Remember these won't be very accurate as the time differences have additional secondary factors, i.e. offsets, which change depending on your exact location offshore. These displayed conversions from garmin are good enough to get you into the right areas though.
Here is how you change your unit to show loran C position:
(you do not need to change the datum or any other GPS settings. Just remember them for when you need to change back to GPS to navigate accurately!)
1)Go into main menu
2)go into system menu
3)go into units menu
4)go into position format
5)change position format to Loran TD
6)go into "Setup" in that same Loran TD pop-up menu
7)change Loran Chain Number to 7980 GRI*
8)change station 1 to Y as in yankee*
9)change station 2 to Z as in zulu*
10)save the above changes to display positions in Loran C TD's- remember old position format settings to see lat/long numbers
*these 3 steps' settings are for Charleston, SC and probably offshore anywhere from Cape Hatteras south to Miami.
IMPORTANT: Remember that this loran C position displayed is not precise but approximate... to get closely accurate, you must manually enter the offsets, which change with almost every degree of longitude and latitude that you move around on the earth's surface....
In other words, do not plug in a loran number as a waypoint and rely on the above setup to navigate there accurately/safely. It could be up to a mile off.