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Real Life Incident: Ferry Trip Ends With U-Turn Into Shore
In the early morning hours, a double-ended passenger/vehicle ferry was loaded and departed on its short run across a river. Visibility was reduced by fog to less than 30 metres but the Master, at the controls, was experienced in this run and the departure was kept to the schedule Another officer was also on the bridge. Both radars were in use and both were set for relative motion display, which is an unstabilised, head-up presentation. This was the standard radar setup for this bridge team on this run as almost all navigation was done visually. No electronic chart system had been fitted on the ferry.
Once the vessel cleared the departure basin and passed the jetties, it quickly fell off to starboard into the river current setting approximately 075° at two knots (see below), but this was not visually apparent to the bridge team. However, the Master and mate both noticed that the gyrocompass repeater heading was rapidly turning to the east.
As the Master and mate monitored the radars, both set on the 1.5 nautical mile scale, they saw the echoes of the nearby landmass quickly shifting, creating a blurred image. This was to be expected since the radars were set on unstabilised, head-up presentation. Nonetheless, the bridge team were now flustered and unable to quickly determine the vessel’s position.
Without visual cues or an understanding of the blurred radar image, the Master and mate looked to the GPS receiver to gain an appreciation of the vessel’s speed. Soon, the lookout reported seeing buoys ahead. The Master manoeuvred to avoid the buoys and, shortly thereafter, some 10 minutes after departure, the vessel grounded. Later that morning, with the assistance of a tug, the ferry was refloated. No apparent damage was found and the ferry resumed service later that day.
The official report notes that ‘… the bridge team was essentially trained and experienced in visual navigation, but undertook a blind pilotage voyage.’
Lessons learned
- Blind pilotage not only requires proper training, but practice too. Practise your blind pilotage technique whenever possibly, especially in good weather.
- A north-up, stabilised radar setup is superior to an unstabilised setting when navigating in low visibility conditions.
Reference: nautinst.org
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Disclaimer :
The information on this website is for general purposes only. While efforts are made to ensure accuracy, we make no warranties of any kind regarding completeness, reliability, or suitability. Any reliance you place on such information is at your own risk. We are not liable for any loss or damage arising from the use of this website.
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