┌──────────────────┬────────────────┬────────────────┬────────────────┐ │ SYSTEM. │ EXAMPLE A. │ EXAMPLE B. │ EXAMPLE C. │ ├──────────────────┼────────────────┼────────────────┼────────────────┤ │1. Announce the │Reference point │Reference point │Reference point │ │ general │ at 12 o’clock │ to our right │ to our right │ │ direction of the│ │ front │ front. │ │ reference point │ │ │ │ │2. Announce the │Single house │High peak │High peak. │ │ reference point │ with 2 │ │ │ │ (the most │ chimneys │ │ │ │ prominent object│ │ │ │ │ in the zone │ │ │ │ │ indicated) │ │ │ │ │3. Announce │Target at 8 │Target at 5 │Target at 4 │ │ position of │ o’clock │ o’clock │ o’clock. │ │ target with │ │ │ │ │ respect to │ │ │ │ │ reference point │ │ │ │ │4. Announce the │Machine-gun │A hostile patrol│A hostile │ │ objective │ │ │ patrol. │ │5. Announce range │Range 1,000 │Range 900 │Range 800. │ └──────────────────┴────────────────┴────────────────┴────────────────┘ PROCEDURE. 1. All men look in direction indicated by 1. 2. Reference point is found in the indicated direction. 3. A clock face (vertical) is imagined centered on reference point and look along the line through the indicated o’clock, and 4. Find the objective at — 5. ...... yards from the firing line. CASE (D). [Illustration: SIGHT LEAF, FINGER, OR UNIT SYSTEM. (When targets are indistinct or invisible, and to define sectors.) ]