"The normal way for an occupation to end is for the occupying power to withdraw from the occupied territory or be driven out of it. "
Gaza's waters are Gaza's territory. Gaza's airspace is Gaza's territory.
http://www.btselem.org/english/gaza_strip/control_on_air_space_and_territorial_waters.asp
Does that sound like Gaza is a sovereign state?
Farming without Land, Fishing without Water:
http://unispal.un.org/UNISPAL.NSF/0/9A265F2A909E9A1D8525772E004FC34B
Dated May2010,
"The area inside the Buffer Zone along the northern and eastern borders with Israel contains nearly a third (29%) of the Gaza Strip's arable land, and is inaccessible to farmers and herders."
The IDF worked on the buffer zone shortly after the disengagment:
http://en.wikipedia.org/wiki/Israel's_unilateral_disengagement_plan
It's probably been extended since then, but I'm not going to look up the details.
That's not control over territory?
It seems entirely in tune with what I quoted earlier:
"In 2005 Israel withdrew its settlers and soldiers but the international community still regards Gaza as occupied territory because Israel has effective control over the Palestinians there. It controls the population register as well as Gaza's sea space and air space, prevents large-scale use of the harbour and any use of Gaza's one airport, conducts frequent military operations in Gaza and controls all crossings into Israel. "
Also:
"We need to understand that when Gaza is open to the other side we lose responsibility for it. So we want to disconnect from it," [deputy defence minister, Matan Vilnai] said. "We want to stop supplying electricity to them, stop supplying them with water and medicine, so that it would come from another place."
http://www.guardian.co.uk/world/2008/jan/25/israelandthepalestinians.egypt