a. Symbol Usage. The diagonal (/) is used to indicate or or and. For example, IP/SP may mean IP or SP or may mean IP and SP.
b. Word Distinctions.
(1) Warning, cautions, and notes. These are used to emphasize important and critical instructions.
(b) A caution indicates an operating procedure or a practice which, if not strictly observed, could result in damage to or destruction of equipment.
(c) A note highlights essential information which is not of a threatening nature.
(2) Will, must, should, and may. These words distinguish between mandatory, preferred, and acceptable methods of accomplishment.
(b) Should indicates a preferred but not mandatory method of accomplishment.
(c) May indicates an acceptable method of accomplishment.
(3) NVS, NVG, and NVD.
(a) NVS refers to the night vision system that is attached to the aircraft; for example, the TADS.
(b) NVG refers to any night vision goggle image intensifier system; for example, the AN/AVS-6 (ANVIS).
(c) NVD refers to NVS and NVG.