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The Physics of Docking 101
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- Опубліковано 9 вер 2016
- Does the thought of docking your boat make your blood pressure rise? Perhaps a better understanding of the forces that work for and against you will help. This presentation from the 2016 Nordhavn Nord2AK rendezvous in Petersburg AK explains in simple terms how a boat moves during docking.
Thanks for well presented and factual video. I am new to sailing, and now sailing a 28' boat, and the information allowed me to quickly understand why I am having difficulties docking, especially backing out of a slip, and how to resolve my challenges.
Just about the clearest explanation I have seen. Finally I understand the core principles which will be very useful as I'm about to spend a week on the upper Thames on my 60' Dutch barge. Excellent. Thank you for the time and effort you have clearly made in making this video.
This information never gets old...Thanks Doug.
First of all I want to thank you for taking the time to teach us. I am moving up to a rudder from years of out boards. I am trying to wrap my head around this concept. You have made it easy to understand. I can't wait to get back on the boat and put this to the test.
Very informative! Thank you very much for the detailed info. Will be revisiting and sharing with others!
Bow thrusters and stern thrusters are fairly common on larger boats. But like everything else on a boat, they will fail, usually at the worst possible time. It is best to know how to manage your boat without them if needed.
Well presented and informative. Thank you
That explains why you can turn the boat better forward than in reverse. Also, practicing 10 feet away before you actually dock, is a good idea. Thanks.
Richard,
Be sure to watch our Physics 102 series, which goes into more detail. We used a drone to show how the boat actually responds in the water to the forces we describe.
Cheers!
Douglas
Very informative and practical. Thank you.
THANK YOU for this! :)
Excellent! Thanks for this. :-)
Very well done. I have just upgraded from a heavy 18' deep V fiberglass inboard outboard to a lighter longer 20' welded aluminium outboard with an offshore bracket and am having a hell of a time getting into our slip. Totally different feel...now I know why. Going to practice your technique.
Tom Clark 💋
@@waynebrasher what is a that a 'kiss for luck' on berthing his new boat?
Thanks for telling me about prop walk
Excellent explanation
I would love to see a video on the Bravo III twin prop outdrive. It does not seem to have any prop walk.
I have a Tritoon with about a 3” clearance on each side of the dock. Any tips or videos for getting the boat perfectly straight? Seems like the stern is the usual culprit, angled to port.
The fan spins on the string because you have tied it off axis to the centre of rotation. You tied it on the side.
Love the videos - If only I had a left hand prop - Would have liked to see how to handle situations where the prop walk doesn't help....
Good video! But you have the leading and trailing edges of the propeller backwards.
good info
Please tune in to our new series of the Physics of Docking 102, which includes video of the boat as seen from the air. We go into more detail in this series.
Safe sailing!
Douglas
and add twin engine boats!
How do you know rudder position once you use the prop wash method. How can you then go back to opposing engines for maneuvering?
You have to memorize the position of rudder, if using opposing engines then you have to start thinking DIFFERENTLY AGAIN to get used to twin engines again.
Before you do any maneuver.. lock the wheel in one direction.. count every full turn till u hit full lock in the opposite direction. Turn back half way to full lock to find mid ships with the rudder.. over time youl know where mid ships is at.. twin engines make life much easier then a single... I could pivot my twin 450hp 40f lochin around anything.
Thank you Mr. Cochran, very informative, now I just need a 48 ft. Hatteras. ;)
Almost anyone can dock a boat IF you have no wind, no current and lots of time. What dictates what a boat does are forces that you control and those you have to account for, or work with. You control directional thrust, you can make inertia(momentum), but so can the wind and current. The FIRST thing you must plan for is wind and current immediately in the area you will be maneuvering for docking. Which will affect you more at a given heading, will you be broadside to the forces, for how long, are the forces combining, vectoring or canceling each other? You have to form a plan and be ready to adapt, abort if the conditions change or guessed wrong. Is there even room to abort? Is there a place to tie up till condition favor entering you slip? The easiest boat to dock is a deep V twin engine. The worst is a large flat bottom single engine. Thrusters and joysticks helms are cheating but no points are subtracted LOL. All boats are different and it's best to find a captain to mentor you that has piloted a similar vessle, not UA-cam. Rum and listening to his sea stories over grub is considered compensation in many areas.
AND for a female student, possibly a blow job as well-(not meaning to harass anyone with this comment, but simply adding my five cents worth as we say in oz).
Around Minute 18 when you're leaving the dock, why wouldn't you change rudder angles in your pivot process: Rudder right when in reverse, then rudder left in forward? Otherwise love this presentation and prop walk as "steamboat wheel" is a nice addition.
Bob, when pivoting a boat in place, you never really want to get much way on. As soon as the boat begins moving forward or backward, you lose the pivot momentum. Even if you have a joystick for steering, it still takes a few seconds to go hock to hock. By that time, you’ve missed the opportunity to shift gears to continue the turning movement. Some people like steering with a joystick. Personally I prefer to have the wheel in hand most of the time when in tight quarters. In my experience, there isn’t enough benefit from what you suggest and there is usually enough other activity requiring your attention that spinning the wheel takes backseat to situational awareness. But try everything some calm day when there isn’t any traffic nearby. Perhaps your boat will respond better under your hand than what I suggest.
Why aren’t bow thrusters nearly standard equipment on many boats ?
Shit breaks often. Should be able to manoeuvre with out them. Any1 can use thrusters
Give me twins any day
@@nickjohns1192 "YOU MUST LEARN TO MANOEUVRE SINGLE SHAFT PROPELLER YOUNG LUKE"- said in Darth Vader voice!
Iv been out on single engine boats most of my life. My opinion when u add up all the pros and cons twin engines are the way to go. Only need thrusters if your boat is worth a fortune and your scared to mark the paint
@@nickjohns1192 twin engines necessary for offshore voyage as a single engine is a risk I take in the ocean. True points u make Nick.Cheers.
I wish you had more pictures near the end. Other wise very informative.
Do you mean more napkin drawings, then yes I'm in full agreement.
Because a lot of boats do not need them. They are at sea or anchorage 90% of the time. On those, the bow thruster would ( fail ? ) any way.
What if you had to know how to dock your boat.
Oh buy the way now it seems 35", 10m and above it is just about standard equipment.
I know I'm afraid screwing up my boat or some other boat ?
It is Docking 101
The same physics works on 9" bass boat with a 9.9hp dock it like a pro :)
Cheers & be safe and fun on the water
A reply to Finn Green :)
I commented :) wrong spot sorry
Geezus, what are you on arrow child!
I was so embarrassed with my new boat the first time at my new docking space at new marina,🙉,,,,Never think you know your new boat"........Thanks 💦
The opportunities to screw up a docking are never ending. With practice, you can reduce the excitement level but it never completely goes away. Cheers! Douglas
Really great content, but audio needs improving. Your microphone's sensitivity is all off.
This isnt how my sailboat works