Ballard Marine - Ch 13, 14 and 16

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Ch 13 - Navigation Safety
 Ballard (Hiram M. Chittenden) Government Locks ("Locks")
 BNSF (Burlington Northern Santa Fe) Bridge 4 ("Bridge 4")
 Ballard Bridge
 Fremont Bridge
 Note:
  Channel 13 is primarily used by commercial vessels.   The channel is pretty quiet on weekends and in the late evening.   For recreational vessels, the bridges are signaled by whistle and the locks are signalled by traffic light.

Ch 14 - Port Operations
 Seattle Traffic/VTS

Ch 16 - International Distress, Safety and Calling

Ch 09 - Boater Calling

Ch 22A - Coast Guard Liaison and Marine Safety Information Broadcast

Equipment

Raspberry Pi 5 single board computer

RTL-SDR Blog V3 receiver

Morad 156HD antenna

RTLSDR-Airband receiver/uploading software