Links
Propagation along the grey line is very efficient. updates every 5 minutes
Short-Path Propagation from UK
Day light map of the world
Working PSK
Work the world on low power in low sun spot
VHF Propagation website MMMON-VHF
Another Propagation website worth giving a visit.
HF MUF
Maximum Usable Frequency.
Marine Traffic Radar
World coverage of marine activity
Flight Radar
World coverage of flying aircraft