Normally, the surveillance card is prepared by the senior operator or the team chief from information furnished by the S2, section leader, or platoon sergeant. Surveillance cards should be prepared for primary, alternate, and supplementary radar sites. They should be transferred to the new unit when you are relieved in place by another radar team. This will save them the trouble of preparing a new surveillance card for the same area. Select a target in the center of your surveillance area and mark it on your map.
All azimuths used are grid azimuths.
Therefore, all compass readings must be converted from magnetic to grid azimuth. On your surveillance card, write 8 before the two zeros in the center at the top of the card. STEP 3 Number the even hundred mil marks around the edge of the surveillance card. Counterclockwise enter 7 on the first hundred mil tick mark and compute all numbers on the card. Since each small tick mark is 20m, the range arm should be three small tick marks past 800m.