Spinward Flow
SOC-14 5K
Vector movement is nice to have ... but given the ranges involved is quite often unnecessary to know with sandtable precision and accuracy.The major difference between LBB2 and LBB5 is vector movement vs. completely abstracted movement.
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It's just my personal preference to not get bogged down in vector movement.
When ranges are measured in fractions of a light-second, the only parameter that matters is the boolean question "Within weapons range? (Y/N)" to enable exchanges of fire.
North / south / east / west / up / down relative positioning ... doesn't really matter all that much in the empty vacuum of (normal) space where there's no "terrain" to get in the way of anything. What matters is "Within weapons range? (Y/N)" followed up by the question of "How many weapons can fire on target(s)?" (which in LBB5 computes to Batteries Bearing).
Any kind of "hiding behind terrain" (usually planets, moons, asteroids, etc.) is a factor often best left to imagination and roleplaying, rather than codified into a vector movement combat system that is difficult to grasp mentally by most Referees and Players (since orbital mechanics are such an "alien" conceptual framework to daily terrestrial lived experience).