How does a fleet commander (regardless of tonnage or size) ensure that a fleet of ships jumps into a system at the same time? More importantly, is where do the ships arrive? This is more of a 3rd and 4th-dimensional warfare theoretical question. While our subsector maps are two-dimensional in nature do the systems represent; are there any notations in any of the literature that a system is "down" or "up" in a 3D universe? Do we use the approach of Ender - “The enemy’s gate is down” refers not to a breech or malfunction, but to the gate’s literal direction. While classic sci-fi shows (i.e., B5) the opening of the jump gates with multiple ships arriving in a near time, is it possible with the rules as written? Where do you position the arrival of an attacking fleet - behind the orbital defense grid (are they configured like the British defenses in Singapore) beyond the planetary gravity so a second jump can be made without refueling? Just curious