1. 1 AA AB AC AD AE AF AG AH 001 002 003004005006007008009 006AG39 006AG3 1 2 3 4 5 6 7 8 9 3 1 2 4 Origin Point 180 E/W & 90S 006 AG Cell to Quadrant to Keypad yields 5 min x 5 min cell; takes advantage of existing 1:100K and 1:50K charts Current 1:50,000 chart has symbology “+” to denote 5 x 5 keypads Each Quadrant Can Be Further Sub-divided Into Nine 5 min X 5 min Keypads Each Cell Is Sub-Divided Into Four 15 min X 15 min Quadrants 1:50,000 charts = 15 min x 15 min GARS Global Overview Each Cell Is 30 min x 30 min 1:100,000 charts = 30 min x 30 min

2. 2 GARS Reference Guidance Diagram GARS Reference Guidance World divided into 30 min cells and further divisions can be 15 and 5 min Origin of the reference system is 90S and 180E/W Longitude will be 1 – 720 and Latitude will be AA – QZ 30 minute cell identifier: 345KW 15 minute cell: Use a quadrant over 30 minute cell Numbered 1-4 Left to right, top to bottom 5 minute cell: Use a keypad over 15 minute cell Numbered 1-9 Left to right, top to bottom Sample Reference: 345KW37 30 minute identifier: 345KW represents the longitude 30 minute division345 represent the latitude 30 minute identifier KW represent the quadrant of the 30 minute cell3 (15 min identifier) represent the keypad of the 15 minute cell7 (5 min identifier) 123 456 789 12 34

3. 3 JOA (GARS OVERLAY)

4. 4 GARS for CT, RI, MA

5. 5 N 1 N 2 N 3 N 4N 5N 6 N 7 N 8 E 1 E 2 E 3 S 8 S 7S 6 S 5S 4 S 3S 2 S 1 W 1 W 2 W 3

6. 6