I don’t think there was ANY radar in the pacific in 37. The set we had in Hawaii in 41 was the very first to my knowledge.
And as for other radio and navigation aids, there was a line of US Navy ships set up along the anticipated route as radio pickets.
This was not an ordinary thing to try. Before that it was only done in the Clipper flying boats with a ton of fuel, and highly skilled navigators, flying the exact routes Noonan had pioneered.
WILSON!!!
There were also a couple of sets in the Philippines.