The ocean's size makes continuous awareness of every ship difficult. A carrier's expected mission can narrow a search, but that depends on correctly judging what the force is doing. Remote trials of tactics, radars, or other equipment give a navy reasons to operate far from normal crisis stations. Point Nemo is raised as an example of a place chosen to reduce the chance of observation. Operational expectations can help a search without guaranteeing that a carrier group remains continuously visible.
Notable Point · 3:39:24-3:41:30
Why an ocean can still hide a carrier group
Satellites narrow a search but do not erase the ocean's scale, and a carrier operating away from expected mission areas can be hard to locate.