Artillery

[Agramer]

Well as was said before...line must be drawn somewhere,and this is GENERIC system and not simulation of reality.As tech progresses many "things" get into shade area where they could be also something else.

Since our subject was Mortar 60 mm so far...I would use just Artillery (mortar) for both kinds of aiming.

In case of Battleship main guns ,I would use Guns(Battleship gun) for direct fire and Artillery(Battleship gun) for indirect fire.
Battleship guy would have unfamiliarity penalty on other types(untill he becomes familiar with them).

Any system must have breakpoints which aint realistic.
Encumbrance as example: 1 lbs more and you move 20% slower...1 lbs less and youre 20% faster....etc

Also application of a lot of stuff is simplified to avoid slowing down game with dozens of rolls....

Actually,take any Category/rule in GURPS and youll see that it doesn't simulate reality correctly.

Also ,there are mistakes,misjudgements,mistypes.....etc (it was done by humans).

So if you are very familiar with some subject...use your experience to describe it in more detail than others can...thatd be your forte...and hence easier to GM...

EDIT: and ROFLOL ,sometimes people will not believe you that is so,due their "movie perception" of things.
"Hand Grenade had to knock back me few yards"
"Modern 7,62 mm military rifle CANT shoot through(penetrate) 40cm tick living tree from 20 yards"
"Brick wall,ordinary family house,will protect me from Heavy machine gun fire" (will to extent)
"If I turn table ,it will stop bullets"
"M-16 5,56 mm rifle shoot will cause knock back"
"all mines only explode after you remove your leg from them"
.......