Missile Combat (GAP)

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Combat that uses missile weapons is very hard on the Astral Plane. Even for a strong mind, it is difficult to fire an arrow or launch a spear accurately while floating in a gravity-free environment. All missile attacks are subject to a -2 attack roll penalty unless the combatant is a native of the Astral (such as a githyanki).
Range for missile weapons differs on the Astral Plane as well. Because there is no gravity to worry about, few or no objects to get in the way, and nothing to obscure vision, all ranges are doubled. So, if the short range of a short bow is 50 yards, on the Astral it is 100. Medium range for the same weapon is doubled from 100 to 200, but since range of sight is only 200 yards, this is basically the maximum range (so there is no long range for the short bow). This is, in fact, the maximum effective range for all weapons.
Essentially, this means that for most weapons all targets fall within short or medium range.
Ranges of weapons on the Astral are effective ranges. This is how far away the target can be and still be effectively targeted. Missile weapons, once fired, thrown, or launched, continue moving on the Astral until they strike something or another force acts upon them. See the chapter "Racing Through Nothing: Astral Movement" for more details