int _CREATE_AIR_DEFENSE_SPHERE(float x, float y, float z, float radius, float p4, float p5, float p6, Hash weaponHash);
Seems to be some sort of handle, result is += 1 any time this native is called.
Both coordinates are from objects in the decompiled scripts.
Native related to _0xECDC202B25E5CF48 p1 value. The only weapon hash used in the decompiled scripts is weapon_air_defence_gun. These two natives are used by the yacht script, decompiled scripts suggest it and the weapon hash used (valkyrie's rockets) are also used by yachts.