1630 appears to have been used for marine comm even back into the 1930s, at least along the Canada Pacific coast. Some of the same stations were still listed in a 1964 update that I found.

- Radio Aids To Navigation 1939, H.O. PUb. No. 205, Vol II

- US Naval Oceanographic Office, Corrections To Radio Aids, H.O. Pub. No. 117B, 23 May 1964

A 1934 Senate congressional record noted that frequencies 1530-1630 kc - were allocated to Moblie A1, A2, A3.

A Canadian publication "Flight Comment" for Jan-Feb, 1971, mentioned an event where one Otter airplane on the ground transmitted on 1630 kc as a beacon to help another Otter make a landing through ground fog.

Google still hasn't turned up anything specific to normal aviation use, though.

Wayne

WB4OGM

-----Original Message-----
From: Hubert Miller <[email protected]>
To: [email protected] <[email protected]>
Sent: Sat, Feb 25, 2023 5:12 pm
Subject: Re: [ARC5] Related Question Maybe - Re: 4-course radio ranges

1630, in later years i am aware of, post WWII for sure, 1630 was a west coast Canada boat frequency.
Boat radios are drastically being thinned out, but you sometimes saw them even in the Seattle area

with one channel on 1630 kcs. I recall hearing Bull Harbor BC with wx broadcasts on 1630. You could

easily hear it in Seattle in winter even on a car radio.

-Hue Miller

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