Real Life Incident: Flawed Departure Plan Results In Contact With Another Vessel
A small tanker was manoeuvring to leave port without tug assistance. The departure manoeuvre began at twilight, with winds from the south of about 10 knots. The pilot, Master, OOW and helmsman were on the bridge. The departure plan, as discussed by the bridge team, was to let go aft and bring the forward spring lines under tension with the engine dead slow ahead and wheel hard to port, swinging the stern away from the berth to starboard. With the stern clear the engine was to be put astern and the vessel backed away from the berth, as shown in the simplified diagram below, steps 1 and 2. The vessel was equipped with a controllable-pitch left-handed-turning propeller. The berthed vessel forward was not seen as a hindrance.
On the first attempt, the wind, which was pressing the vessel on to the berth, brought the vessel’s stern back close to the berth, nullifying the manoeuvre. It was agreed to moor the vessel again and make another attempt. As the vessel was closing the berth it had some speed astern.
Ahead engine was applied but the vessel still bumped the fender astern. Then, because too much ahead power had been used, the vessel surged forward and came into contact with the vessel moored ahead, its port bow contacting the starboard aft quarter of the other vessel. The port side anchor remained entangled on the stern railings and deck fittings of the moored vessel.
Lessons learned
- Although winds were light they nonetheless did not help the planned manoeuvre. When manoeuvring always look to use the elements to your favour. If this is not possible, consider the use of one or more tugs.
- The left-turning CP propeller, which will normally cant the stern to port irrespective of ahead or astern thrust applied, should have been an early indicator that carrying out this plan without tug assistance was not advisable.
- In dark conditions a person’s visual acuity is not as sharp as in daytime. Missed visual cues while manoeuvring in tight quarters in darkness could contribute to less than adequate performance.
Reference: nautinst.org
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.
Related Posts
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.
Related Articles
Latest News
⚓️ Enhance Your Knowledge. Prevent Accidents. Stay Safe at Sea.
1. eBooks for Engine Department
Master machinery operations, troubleshooting, and safety procedures with expertly written guides tailored for marine engineers. Prevent costly breakdowns and onboard accidents through practical knowledge.
👉 Explore Engine Department eBooks
2. eBooks for Deck Department
Sharpen your seamanship, navigation, and cargo-handling skills with real-world case studies and practical insights designed for deck officers and cadets.
👉Discover Deck Department eBooks
3. eBooks on Electrical Fundamentals & Issues
Understand marine electrical systems, identify potential faults, and prevent onboard electrical failures with step-by-step explanations from industry experts.
4. Pocket Guides for Quick Reference
Compact, handy, and loaded with essential checklists—perfect for on-the-go reference during operations and emergencies at sea.
5. Combo Packs to Save Big
Access multiple expert eBooks at discounted prices. Ideal for professionals seeking complete safety and operational knowledge across various ship departments.
6. Digital Maritime Courses – Learn at Your Own Pace
Upgrade your competence with Marine Insight Academy’s online courses. Learn from industry professionals anytime, anywhere, and become a safer, smarter seafarer.
Subscribe To Our Daily Newsletter
By subscribing, you agree to our Privacy Policy and may receive occasional deal communications; you can unsubscribe anytime.
BE THE FIRST TO COMMENT