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Conference vicki::boats

Title:Powerboats
Notice:Introductions 2 /Classifieds 3 / '97 Ski Season 1267
Moderator:KWLITY::SUTER
Created:Thu May 12 1988
Last Modified:Wed Jun 04 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1275
Total number of notes:18109

759.0. "Backing down a single engine boat" by KEEPER::THACKERAY () Mon Oct 01 1990 13:30

    Last night I tried to back down into my small slip, with a boat about
    2' to the other side. I like to back into the slip because I often have
    to unload a lot of kit (diving gear, tanks etc....). But the boat is a
    single mercruiser, and in my 25' Bayliner, backing in is tough to do.
    
    Last night, the current and wind were with me as I tried to keep the
    stern straight and lined up with the slip. I drifted sideways and
    started again for about five occasions before my steering pump gave 
    out on me at an awkward moment and we ended up drifting sideways towards 
    the docks and had to manhandle the boat into the slip........aagh, I 
    hate accepting shore help through bad seamanship!!!
    
    Does anyone know of any tricks to back down a single engine cabin
    cruiser into a slip, in bad conditions, and make it look easy? Or
    should I forget it and put her in prow first? I'd hate to have to buy a
    keel!
    
    Tally-ho,
    
    Ray
T.RTitleUserPersonal
Name
DateLines
759.1SPRING LINESBIZNIS::CADMUSMon Oct 01 1990 14:0214
    
     I have a 22' and back ito my slip- and it's in very tight quarters,
    When the wind and current are agaist me, I've always used spring lines.
    I take a line from a bow cleat, run it past the stern, and make it fast
    to a cleat on the dock that I ususlally tie the stern line to. - I then
    put the engine in gear, turm the wheel so that the rudder is slightly
    off cenetr an tring to bring the stern toward the dock.-
    Puts me up agaist the dock slicker'n a smelt.
    
     Chapmans has some pretty good hints on dockin in close quarters in 
    less than ideal conditions. If you understand the forces and reactions,
    you can do some amazing manuevers- especially in a single screw
    inboard.
    
759.2Backing into a slip with a single I/OUSCTR1::FMACGILLIVRAMACGILLIVRAYMon Oct 01 1990 14:0611
    I have exactly the same problem that you mentioned with a 28' Bayliner
    single outdrive.  My biggest problem is the bow going out on me which
    forces me to have to go forward to gain control of it and then
    attempting to back in again.  I try to gauge the wind.  If it is
    strong, I need to get in quickly or I am in trouble.
    
    I would be interested also in any special techniques that anyone has.
    So far, I have not seen anyone who has a technique to keep the bow
    from straying on you.
    
    Look forward to anyone's suggestions.
759.3May I suggest a bookSTAR::KENNEYMon Oct 01 1990 14:319
    I have a copy of a very good book that covers just about every boat
    handling case you can imagine.  The title is something like (Boat
    handling in tight quarters) if I remember I will look it up tonight. 
    Could be worse try backing a large under powered sailboat into a tight
    slip makes you appreciate the luxury of having an outdrive and power to
    spare.

    Forrest
759.4I can relate to thisSUBSYS::CHESTERMon Oct 01 1990 17:4118
    Very familiar with this problem.  26 ft starfire with a single IO.
    I can get it right 5 to 8 time in a row then oops. Then it's time to play
    with the 600 grit sandpaper again.  I came to some conclusions.  If the
    wind is directly on to the slip.  don't even think of it.  Bow in.
    If the wind is off the slip.  No problem.  Makes it look easy.
    If the wind is at right angles to the slip.  Approach into the wind
    and start the turn.  Let the wind almost complete the swing then back
    in.  If you miss you can make it look like you where planing to do a
    complete u-turn.
    
    The other thing that helps.  Have strong mate in the bow with
    a pole/boathook etc to fend off when you misjudge.  Note not if
    when.   
    
    Good luck and keep trying.
    
    
    Ken Chester
759.5try this, and be patient...HYEND::J_BORZUMATOTue Oct 02 1990 13:0552
    Ray, (and others) my last boat was a 28' with a single screw, and it
    took me awhile to understand what was happening.
    
    1st of the dam thing would only back to Port, i don't care what 
    you did. I devised a scheme which i will attempt to explain below:
    
    
    The situation i was in was: The marina had poles to which you attached
    you bow lines, and a floating dock (it can be done with fixed docks)
    
                               South       ---Wind is South West 20 Knots--
    
                      <-------------  (your boat) 
  East       X          X          X          X          X     West
                                          y
                                          o
                                          u
                                          r
                               North
                                          s
                                          l
                                          i
                                          p
    
    
    
Send your mate into the cockpit, have them grab the line on the pole,
    which in effect is your Port bow line, and have them attach it
    to your port stern cleat. Make sure they only take 1/2 turn on it,
    and DO NOT make it fast. FORGET WHER YOUR RUDDER OR DRIVE IS
    FOR THE MOMENT. Put it in reverse, at low speed, the stern of 
    the vessel CAN ONLY go into your slip. Once the stern is about 1/4
    of the way in, have the mate remove the line from the stern
    cleat, at this point it will no longer help.
    
    KEEP THE FOLLOWING IN MIND:  
    
    Power with Power, always power your bow against the wind, if you
    don't the wind will take your bow as you ALMOST get into your
    slip. When you Power with Power, you need only to add more throttle
    to overcome the wind.
    
    I have twin inboards, and at times the wind does funny things
    and it ain't worth the hassle, so i use the above.
    
    The second time you do this, it will feel is if you always did..
    
    
    JIm.
    
    
    
759.6oooooooppppppppsssssHYEND::J_BORZUMATOTue Oct 02 1990 13:0812
    re: .5  
    
    the X's are the poles in front of you slip.
    
    The first thing to do is Lay the vessel against the poles.
    
    
    Sorry i omitted these..
    
    
    
    JIm.
759.7DO IT SLOW! NO POWER!SALEM::KLOTZThu Oct 04 1990 14:3481
    I (Humbly) disagree with some of the above comments & ofFer some
    thoughts:
    
    The concept of always trying to power the bow into the wind/current
    is not as recommended as most think.    Your boat is a weather vane 
    and the bow tends to want to point into the wind by nature.  If you
    watch a professional sport fishing captain in a real bad blow they 
    will always go stern to the wind and let the bow follow.
    
    I have found there are two big catches (therefore some mistakes) folks
    tend to make:
    
    One is the mere concept of "Powering into the slip" - this only needs
    to be done if the wind/current has a major vector comming out of the
    slip -- otherwise the vector is towards the slip (possibly at some
    angle) but none the less will cause you to drift 'into' the slip -
    your goal in this case is to 1) DO IT SLOWLY & 2) OFFSET THE DRIFT
    caused by the wind/current.
    
    Try this out in the open (away from the slip) -
    Regardless of wind/current there are two positions of the boat where
    you can hold it motionless 1-Bow towards the vector 2- Stern towards the
    vector.    Pick one of these - say bow towards the vector first - and
    try to remain in ONE SPOT.  The way you do this is with short &
    dileberate bursts of the throttle while keeping the boat directly into
    the vector (i.e. you get pushed back two inches then power forward two
    inches)
    
    Once you can do this try turning the bow a very few degrees towards
    port -- this results in the vector hitting the starboard side so if you
    maintain no forward or reverse motion the boat will slip towards the
    port (looks like it is going sideways)
    
    Now try it to the starboard motion, then reverse the vessel and try
    both motions with the stern into the vector of wind/current.
    
    Now that you can do this go to your slip and slide the boat sideways 
    until you are about lined up for entry and motionless (either bow or
    stern first - though I prefer stern in):
    
    If the wind is OUT of the slip its easy: You use short bursts to
    overcome the vector and slide in.
    
    If the wind is INTO the slip it's also easy: You use SLIGHTLY less
    bursts of power than it takes to remain motionless - the vector is not
    overcome - so the vessel DRIFTS into the slip.
    
    If the Vector is cross to your dock (too many total angles to discuss so
    just get the concept) it's tricker; but, not difficult:  Move the
    vessel towards the direction the vector is comming from a few feet & 
    again remain motionless - now - with a slight change in the angle of
    the vessel the wind/current will try to walk you sideways back pass the
    slip again - if while doing this you apply the short bursts (or use
    less) the vessel will also have a motion into the slip.  You want to be 
    close to the slip entry & inch it in as you are slowly drifting pass
    it.
    
    The First line you want to drop is a spring from a Mid-Ship cleat
    towards the direction the vector is comming from (Bow or stern) -
    This will cause the motion of the vessel (in/out of the slip) to be 
    checked and neither the bow nor stern will drift out too far because 
    the other end will lean into the dock.   Indeed if the vector is very
    strong leave a little power on into the vector with the wheel cut such
    that it forces the boat into the dock.
    
    By now I have you entirely confused; sorry but, it's hard to explain
    without a chaulk board - but for all it's worth I have used this
    technique on a 20' Single outboard cuddy, a 26' single outdrive cabin,
    and a 34' twin inboard in the Merrimack River for 9 years with very
    good success - currents in the 0 to 6 knot range at 30 degrees to the
    slip & every wind you can think of - so I believe in it.
    
    If you'd like to discuss it for clarity feel free to give me a call.
    
    One last comment (from an overly wordy type) THE KEY IS SLOW!!!
    If you can't hold the boat motionless & move inches at a time practice
    this first.   Do it SLOW & don't get Stressed.
    
                                 Good Luck,
                                            Lou
    
759.8Practice makes (almost) perfectHOCUS::CULLENFri Oct 05 1990 17:4813
    If I may offer some further suggestion...
    
    I am in violent agreement with the suggestion of SLOW.  My addition
    to this advice is that you should keep in mind that a Right hand screw
    boat(as most are today) will back to PORT.
    
    I have also successfully used the concept of wind vectors to control my
    boat in docking maneuvers for the past 14 years.
    
    good luck,
    
    Tom Cullen  
    
759.9Agreement and more info.SUBSYS::CHESTERFri Oct 05 1990 19:1819
    I agree with the previous two replys.  Go slow and use the wind/curend
    to turn the boat.  As a clarification to .4, backing into the slip is
    not the main problem.  The main one is the 90 deg turn I have to make
    at the end of the slip.  The distance from the end of the slip to the
    pier on the other side of the channel is about 30 to 35 feet.  I have
    tried using the slips on the other side of the main pier.  There the
    distance is several hundred feet to the next pier.  So I can set up
    the boat to drift into the slip or use power to overcome the wind
    current.  Much easier.  There is time to correct for errors.  
    
    On the narrow side. when the wind is across the slip.  Approaching with
    the bow into the wind allows me to start backing in and use the wind to
    swing the bow.  
    
    Thanks for all the ideas.  I will be tring them this weekend.  
    
    
    Ken C
    
759.10FREEBE::FEUERSTEINIf it isnt a SEARAY...Fri Oct 05 1990 22:4028
    
                          -<Slow and practice>-
    
      I have to agree that docking manuevers are best done slow, with
    
    just enough power to maintain control. The trick is to know how
    
    much your boat is affected by the varying angles ands strengths
    
    of the elements and what it take to overcome them. Every boat reacts
    
    slightly differently due to amount of freeboard,weight,hull design,etc.
    
    Basically, know your boat. Test it in open water. A few of the previous
    
    notes talk about spring lines. This is all well and good with a
    
    knowledgeable crew-mate. I would suggest that you learn to dock
    
    the boat without depending on extra help. There are invariably times
    
    when that extra help isn't available.  IMHO the most important aspect
    
    of tight manuevering is to know the pivot point of your boat and
    
    set up using that knowledge.
    
    Andy
759.11A piece of cake!WJOUSM::SCHLEGELTue Nov 27 1990 13:414
    Oh boy! You guys (and gulls) are going to love this!
    I humbly suggest the use of my recently invented portable bow-thruster.
    It slips over the bow.  I haven't figured out what to charge for it,
    yet. If seriously interested, contact me at home (617-237-2952).
759.12Hire a tugboat.SALEM::NORCROSS_WWed Nov 28 1990 09:054
    You could always have a tugboat standing by.
    Wayne (who_crashes_into_the_dock_because_his_motor_stalls) Norcross
    
    
759.13Electric Trolling MotorEXPRES::GILMANWed Nov 28 1990 09:264
    How about an electric trolling motor?  That would make a pretty good
    bow thruster would't it?  They are readily available too.  
    
    Jeff