So we have a new third mate, making his first trip at sea. Sharp guy, learns fast. The ship is transiting through a short passage between reefs, maybe about four of five miles wide, daytime, good visibility. At the end of the passage there’s a turn into more open water. The ends on both sides of t…

An interesting thread. I note that no one has mentioned the grounding of ROYAL MAJESTY off of Nantucket in June of 1995. Ref: https://towmasters.files.wordpress.com/2009/03/ntsb_royalmajesty_grounding.pdf “The National Transportation Safety Board determines that the probable cause of the grou…

Related - aside. Many year ago I had a safety job at a New Jersey refinery. One ship that was destined to go to the refinery with our oil on board was reported aground in Stapleton anchorage. I was discharged to go out and observe only since our oil was aboard. As i rode out on the launch …

I mischaracterized this as instrument vs non-instrument which is not the best way to think about it. This is also from the linked post in the OP I usually set the trails to automatic (all targets, including land, are trailed) and relative, with an appropriate and short time interval rarely excee…

Kelvin Hughes made a display for collision avoidance that refreshed itself every 3 or 6 minutes, may have been more. The display was about a 30” cathode tube that didn’t need a hood in daylight unlike radars of the period. All it showed were the tails of targets and in a vessel doing 27 knots in the…

How information is displayed is important. With the target trails the one big ship at speed and crossing can be picked out from a screen full of squid boats that are drifting with just a glance. In restricted waters a quick look at the difference between CMG and heading vectors on the radar i…

[image] Klaveness: What’s being discussed here aren’t just the skills of visual navigation and collission avoidance, those are actually so simple and intuitive that they can be taught to a young child. Equally important is the mental framework for prioritizing and corelating information streams,…

What if they can’t see? You propose that they should spend most of their time ‘keeping a lookout’ with only occasional glances at ECDIS/ARPA but that only works under conditions of good visibility. Comparatively putting the focus on skilled use of instruments and confirming that they’re operating …

[image] MAK: What if they can’t see? You propose that they should spend most of their time ‘keeping a lookout’ with only occasional glances at ECDIS/ARPA but that only works under conditions of good visibility. In that case of reduced visibly they would be required to call the master. A new…

Here is: A 260-strong Chinese fishing fleet lighting up the horizon [image] If those boats were ahead of the ship I’d change course until there was a clear path ahead of the ship and then steer that course. Almost all of them would be drifting, but they will be a few moving. Plus there may be a b…

on our steady run there was always a large fishing fleet of the coast of florida - north of the bahamas. It was usually a call to the Master a few hours early to ask if he wanted to go to work that night, or if he wanted me to " go to sea " and leave them all inside and take a few hours of divers…

Losing the Plot - Navigation / Piloting / Collision Avoidance

Professional Mariner Forum

Kennebec_Captain August 20, 2021, 12:04pm 113

That’s why target trails are used.

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Losing the Plot - Navigation / Piloting / Collision Avoidance

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