lots of noise on VLF

Very low frequency. VLF radio waves (3–30 kHz) can penetrate seawater to a depth of approximately 20 meters. Hence a submarine at shallow depth can use these frequencies. A vessel more deeply submerged might use a buoy equipped with an antenna on a long cable.

Some subs cruising around Venezuela?

small VLF signal from Kralendijk, Caribbean Netherlands

http://bonaire.twrmon.net:8073/

https://www.google.com/maps/place/12%C2%B010'16.0%22N+68%C2%B016'56.0%22W/@12.17112,-70.5234209,7z/data=!4m5!3m4!1s0x0:0x0!8m2!3d12.17112!4d-68.28221

Strong VLF signal from Port of Spain, Trinidad

http://9z4rgsdr.ddns.net/

https://www.google.com/maps/place/Woodbrook,+Port+of+Spain,+Trinidad+and+Tobago/@10.6621894,-66.0082412,6z/data=!4m5!3m4!1s0x8c360811ff07edeb:0x259c22f526fd04f!8m2!3d10.6636899!4d-61.5267426

so we have Hamfags, PlaneFags, Boatfags, Any Subfags?

>>6372730

looks like a bunch of RDL callsigns

RDL RUS @ 18.10 VLF

RDL is one of the callsigns used on a Russian Navy one-way strategic broadcast present on many HF frequencies, and also on VLF.

The network carries Morse code and T-600 data, using BFSK modulation with a shift of either 200 Hz on HF or 75 Hz on VLF. It airs the following types of messages:

http://priyom.org/military-stations/russia/rdl

also

Alpha F3 RUS & Alpha F3 RUS

https://en.wikipedia.org/wiki/Alpha_(navigation)

http://9z4rgsdr.ddns.net/

Port of Spain, Trinidad