Best listening site for Shanwick and Santa Maria is the G8JNJ SDR on www.sdr.hu
. Is based in the Southwest UK somewhere but has a monster antenna and has no problem pulling in Gander on 8 and 11 MHz through the UK day time too which is generally unheard of, particularly for 8 MHz.
Current daytime Shanwick freqs are 5649 6547 6595 6622 6667 8879 and occasionally 10021 if the conditions are rough. 8879 and 10021 nearly exclusively used for eastbounds at 30W and the northbounds coming up T9 and T16 from the Canaries and Portugal.
Maria is always on 8825 and 8906.
Gander current daytime freqs are 8831 8864 11279 and occasionally 8891. They were using 11336 instead of 8831 up to 11 November but have swapped back down to 8831.
Gander night time freqs are currently 2899 3476 5616 and 8891.