VHF is no replacement for Colregs - https://www.marinemec.com/news/view,opinion-avoid-using-vhf-and-follow-colregs-to-prevent-accidents_51651.htm https://www.ma

VHF is no replacement for Colregs - https://www.marinemec.com/news/view,opinion-avoid-using-vhf-and-follow-colregs-to-prevent-accidents_51651.htm https://www.marinemec.com/news/view,opinion-avoid-using-vhf-... There have been multiple collisions attributed to two ships talking to each other, not realising that the ship they were looking out the window was not the ship they were talking to. Additionally, the sirens are pretty loud and the Captain/Navigator's cabins are normally in a position to hear them. Any CO who hears 5 short blasts in the vicinity of their ship is going to sprint for the bridge. In short, 5 short blasts is what IRPCS tells you to do - so you should do it.