|
|
Techniques
& Maneuvers
Coming Alongside a moored boat, pontoon or jetty (under power or sail) The procedure is very similar to picking up a mooring. The most important preliminary is to establish the direction of wind and tide. Once again, there are basically two procedures, with a third slight variation. When wind and tide are in similar or opposite directions, follow the routines outlined for picking up a mooring. The only additional problem is that with jetties or pontoons your choice of escape routes is likely to be more limited if things go wrong with the approach. The third variation is if the wind is blowing across the tide. The principle to remember is that when the sails are hoisted the yacht is likely to be wind-rode; when they are dropped it is likely to be tide-rode. This will not apply when one of the forces is much stronger than the other but it makes a good general rule. Your approach should always be into the tide. If the jetty or pontoon lies parallel to the tide, choose which side of it to approach. If you are heading for the leeward side of the jetty, treat it as 'wind and tide together' and approach with both sails up. If you have to sail for the windward side of the jetty, treat it as 'wind and tide opposed' and lower the mainsail. If the jetty or pontoon is perpendicular to the tide, always head for the downtide side. Treat it as 'wind and tide together' and do not lower the sails until your mooring lines are secure. |
|
Leaving a jetty with Onshore & Offshore Winds
|
Approaching
a jetty |
Approaching
a jetty
|
|
Although with a lightweight yacht you can temporarily make fast with just bow and stern lines, the following method provides security for all sizes of craft. Normally four ropes or mooring lines are used to secure a boat alongside. The head rope is led from the bow well forward along the jetty. Similarly the stern rope is led aft from the stern. These are normally the first two ropes taken ashore, since they will locate the boat in her berth. Better security is provided by springs, which hold bow and stern in to the jetty and prevents the boat from surging alongside. One spring is taken from the bow to a point aft. This is known as the forward spring because it stops the boat moving forward. The back spring or aft spring is taken from the boats stern to a point well forward on the pontoon |
|
|
With practice in a yachting dinghy you should be able to bring the radius down to one boat length, meeting the criterion that, should the action be "frozen" at any moment, everything is perfectly suited to the points of sailing. Each tack and gybe should be smooth and the boat should remain upright throughout. The beauty of this exercise is that, if you have the ability you can keep up the circling almost indefinitely whereas if you are not totally in control of your tacking and gybing, you will end up with a cockpit full of tangled sheets. |
|
In congested areas it may be necessary to leave the beach or jetty by sailing backwards.This technique is also used to clear debris that may be caught around the keel or rudder before the race start. Properly done, this technique appears elegant, but it is not simply a matter of pushing the boom as far forward as you can and the crew holding it in position. There are three
important points for the helmsman
to remember: |
|
If you want to land on a lee shore or berth the yacht stern to and then sail off again after a short break, the following variation may be useful. Success depends on knowing the length of your anchor warp, assessing distances accurately and the crew communicating and co - ordinating their roles. 1.
Sail towards the lee shore, turn head to wind and drop anchor To sail away, simply release any stern lines, haul on the anchor warp until you are in deeper water, hoist sails, recover anchor and sail away. If you are blown aground on a lee shore unintentionally and cannot sail off again immediately, lower your sails. Do not raise the centerboard, because you will only be blown further on. To get afloat again, try heeling the yacht and kedging off. |
|
|
Until you become familiar with a particular stretch of water there is always a chance that you will run aground. In muddy estuaries the first indication of trouble is a gradual slowing down accompanied by a loss of steering. Your natural reaction to raise the centerboard will save you if you are on a weather shore. It could be your undoing if you are on a lee shore, because you will simply blow further on to it. Your AY Instructor will give you practical experience on getting off a leeshore. If the water is a manageable depth on a small yacht you need only jump overboard, push the bow round towards deep water, lower the centerboard and sail away on a close hauled course. If the water shelves gently and is muddy it is often best to abandon any hopes of sailing off. Lower the sails and row out into deeper water then hoist the sails and sail away. The principal problem
is that shallow water prevents you from lowering the centerboard.
Alternatively, kedge your way off by throwing the anchor and warp as far as possible to windward; then haul the boat to it and repeat the process until you are in deep enough water to hoist the sails at anchor and sail off As a general rule, prompt decisive action will get you off while indecision generally results in total defeat and at risk to stranding - when the only way you will get afloat is with a tow from a rescue boat. |
|
Return to AY
Main Menu |