# Aidaperla broke moorings in Le Havre **URL:** \ **Category:** Professional Mariner Forum\ **Created:** [September 8, 2026, 9:13pm UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310 "2026-09-08T21:13:01Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Hornblower](https://avatars.discourse-cdn.com/v4/letter/h/ecccb3/32.png) [@Hornblower](https://forum.gcaptain.com/u/Hornblower)\ **Post date:** [September 8, 2026, 9:13pm UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/1 "2026-09-08T21:13:01Z")
Doesn’t seem to have made the English speaking press yet. [Le Havre: a giant liner, with some 2,000 passengers on board, breaks its moorings because of a strong gale](https://france3-regions.franceinfo.fr/normandie/seine-maritime/havre/le-havre-un-paquebot-geant-avec-quelques-2-000-passagers-a-bord-rompt-ses-amarres-a-cause-d-un-gros-coup-de-vent-3413816.html) ---
**Author:** ![Antonio\_GArcia](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.gcaptain.com/antonio_garcia/32/71208_2.png) [@Antonio\_GArcia](https://forum.gcaptain.com/u/Antonio_GArcia)\ **Post date:** [September 16, 2026, 11:18am UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/2 "2026-09-16T11:18:12Z")
It would be interesting to know if she was shore power connected and therefore disconnected due to the break off, while for a period it was in blackout condition before starting generators to run mooring machinery, auxiliary services etc. ---
**Author:** ![jimrr](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.gcaptain.com/jimrr/32/38358_2.png) [@jimrr](https://forum.gcaptain.com/u/jimrr)\ **Post date:** [September 17, 2026, 4:33pm UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/3 "2026-09-17T16:33:36Z")
I’ve seen the lines break i think 3 times. definitely unfun! one was on a tanker! ---
**Author:** ![Hornblower](https://avatars.discourse-cdn.com/v4/letter/h/ecccb3/32.png) [@Hornblower](https://forum.gcaptain.com/u/Hornblower)\ **Post date:** [September 17, 2026, 6:30pm UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/4 "2026-09-17T18:30:12Z")
Sheltered in a ‘safe port’ last winter; had 12 lines out and damaged or broke all of them and pulled a bollard out of the quayside. I love 0315 on a Sunday morning. 🙂 ---
**Author:** ![Hogsnort](https://avatars.discourse-cdn.com/v4/letter/h/ba8739/32.png) [@Hogsnort](https://forum.gcaptain.com/u/Hogsnort)\ **Post date:** [September 18, 2026, 3:16am UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/5 "2026-09-18T03:16:57Z")
Here in Auckland a car carrier’s head ropes exerted a vertical force never envisaged when the wharf bollards were installed. The bollard weighing perhaps 300kg went completely over the forecastle and landed in between the finger piers about 200 metres from the ship side. ---
**Author:** ![Kennebec\_Captain](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.gcaptain.com/kennebec_captain/32/13_2.png) [@Kennebec\_Captain](https://forum.gcaptain.com/u/Kennebec_Captain)\ **Post date:** [September 18, 2026, 11:36am UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/6 "2026-09-18T11:36:00Z")
A Seattle ship pilot showed me this or a similar graph. ![image](https://us1.discourse-cdn.com/flex016/uploads/gcaptain_maritime_forum/original/3X/8/7/8755a157f942a836089bd0c19b8e571f4bac3412.jpeg) From Henk Hensen’s _Tug Use in Port_, A simple formula: ![image](https://us1.discourse-cdn.com/flex016/uploads/gcaptain_maritime_forum/original/3X/c/a/ca7f62f29cb34b095c78c3837a0a4968b19122b6.png) From here: [https://www.vos.noaa.gov/MWL/aug1999.pdf](https://www.vos.noaa.gov/MWL/aug1999.pdf) I’ve found this useful, YMMV. ---
**Author:** ![AKBJR](https://avatars.discourse-cdn.com/v4/letter/a/c89c15/32.png) [@AKBJR](https://forum.gcaptain.com/u/AKBJR)\ **Post date:** [September 18, 2026, 2:12pm UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/7 "2026-09-18T14:12:56Z")
This is the formula I brought with aboard “Green Cove” and “Green Dale” - ATHWART WIND FORCE = 0.52 X 10 X A X W A = AREA IN SQUARE METERS W = WIND FORCE IN METERS PER SECOND I don’t recall the source. ---
**Author:** ![Kennebec\_Captain](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.gcaptain.com/kennebec_captain/32/13_2.png) [@Kennebec\_Captain](https://forum.gcaptain.com/u/Kennebec_Captain)\ **Post date:** [September 19, 2026, 10:13am UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/8 "2026-09-19T10:13:44Z")
> [@AKBJR](#): > > ATHWART WIND FORCE = 0.52 X 10 X A X W I’ve not seen that one but it can’t be correct in that form.. Wind force increases with the square of the speed so in any correct formula the “W” has to be “W²”. This one for example from Captain R.W. Rowe’s The Shiphandler’s Guide. Force in tons = (area/1000) (velocity squared / 18 ) Velocity is in meters per second, area is in meters ---
**Author:** ![Steamer](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@Steamer](https://forum.gcaptain.com/u/Steamer)\ **Post date:** [September 19, 2026, 10:55am UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/9 "2026-09-19T10:55:13Z")
> [@AKBJR](#): > > Green Cove Keep in mind that formula came from Central Gulf. ---
**Author:** ![AKBJR](https://avatars.discourse-cdn.com/v4/letter/a/c89c15/32.png) [@AKBJR](https://forum.gcaptain.com/u/AKBJR)\ **Post date:** [September 19, 2026, 12:48pm UTC](https://forum.gcaptain.com/t/aidaperla-broke-moorings-in-le-havre/77310/10 "2026-09-19T12:48:18Z")
You are correct, thanks. I left the exponent -4 off 10, and the 2 off of W. Force is in metric tonnes. “Wind force or pressure increases with the square of the wind speed because the kinetic energy transferred by moving air grows quadratically.”