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The Alsace with Crown Blue Line
Back to Alsace main page
Special web charter feature in support of PBO’s editorial in the February 2003 issue
The PBO CEVNI Guide
Free Download- The Highway Code for The European Inland Waters

The Alsace canals
PBO’s CEVNI guide is based on Chinese logic and set out according to the colour of signals rather than the types of signals. This means that the information can be drawn quickly i.e. If you came across a blue signal, then you immediately go to the blue section to identify the meaning of the signal.

The guide is downloaded in a PDF format and you should have Acrobat Reader installed on your Mac or PC to open and print the document.

For the free Acrobat Reader software    click here

Download Red/Blue/Yellow signals   click here
(A3 colour printer required)

Download Green/White/Sound signals   click here
(A3 colour printer required)
Watch the video sequence of passing through the above automatic lock. First click on the traffic light video to observe the sequence of lights prior to entering a lock.

Then click on the control post video to see what happens when you initiate the automatic lock sequence.Lastly click on the bollard video to see the various techniques of slipping on to the bollards, especially when they're out of reach!


The whole automatic process is initiated by a radar or photo electric cell situated some 200m or so from the lock (well outside the envelope of this Illustration) and prepares the sequence of locks ahead of you. Once you arrive at the lock the traffic signals will either allow you to go straight in or instruct you to wait. The interpretation of these traffic signals can be found in PBO’s CEVNI guide which can be downloaded free. If instructed to wait, then its best to single up on the waiting pontoons situated just short of the lock entrance. Some boats hover outside the lock and can end up in the way off the exiting traffic so its always best to pull over to one side. Once the traffic signals allow you to enter, then move swiftly into the lock and find yourself some bollards to slip up to. Generally the locks can take up to three boats at a time and the boat which ends up nearest the head lock (the upstream lock) needs to take extra caution for the boat needs to be positioned a good metre clear of the gate to avoid the sill. If the boat hits the sill when the lock is emptying, then the results could be disastrous.

Midway along the lock is the control post which houses a blue and a red lift rod. The blue rod is to start the automatic lock process and the red rod is the emergancy stop. Whoever operates the control post shouldn’t do so until there’s an all round thumbs up from the other boats. Don’t give the OK signal until you’re absolutely happy, especially if you’re the boat next to the head gate.

Once an all round agreement is achieved, the blue rod on the control post is lifted smartly upwards for a few seconds and this will start the lock’s automatic sequence. Should anything go wrong, like a man overboard or if a boat is caught on the sill, then the red control rod is lifted to initiate the emergency stop. The lock’s automatic sequence should immediately stop and call out the lock supervisor at the same time. Should you encounter any other problems like a broken down lock, then the intercom housed on the control cabin is used to speak to the supervisors. These officials zip around to and fro between the locks under their jurisdiction and can reach you with 5 minutes or so.

Once the lock has finished its sequence, then the exit gates will open. Don’t delay in moving out, especially if in a convoy, for the last boat out could have a hairy time as the klaxtons sound off to prepare the lock for those boats waiting behind you. The photo cells located at the lock gates are there to count you in, as well as count you out. The cells also signals ahead to the next lock to prepare it for your imminent arrival.

Be prepared for any disaster for if something does go wrong in a lock it will need a fast response. A very sharp divers knife should be at hand in the cockpit ready to cut the ropes in one clean blow if need be.
Some boats like to stop off for lunch at the waiting pontoons situated off the lock entrance. If you do so yourself, them make your intentions known to arriving traffic and wave them through. If not, then they could be mislead into thinking you’re waiting in a queue to enter the lock.

Remember that commercial traffic has priority and has the right to jump the queue to any lock. To the unfamiliar, this may appear outrageously rude and possibly provoke a reaction which may later prove embarrassing.

Lock Techniques

Lock Techniques
Going upstream through a lock is the inverse of the above. A crew member climbs the wall ladder to receive and slip the bow and stern lines from the two crew left on board. The lock is activated and flooded by the shore crew member who then simply hops on board when the boat leaves the flooded lock.

What troubled me in this research, was that we were a family of four with two very young children and the eldest of 7 couldn’t be relied upon to be an affective member of the crew- not safely any way. This meant there was only my wife and myself to do the work of supposedly three people.

The first half of the cruise was a descent through the locks and naturally things didn’t go well through the first few locks - it was a mess, and not really helped by the fact that between the two of us we had to keep half an eye on Edward, William (3) was not a problem since he was harnessed on.

We had just entered a flooded lock starboard side on, and whilst struggling with the bow and stern warps, our saviour came from a French lock keeper who instantly understood our difficulty. He could see that the boat was properly warped up at every quarter and so quickly grabbed the aft starboard warp, led it up to the midship kleat, put a hitch around it and slipped the remaining tail of the warp around a bollard. Within a brief few moments, he had simply thrown away all that was said in the manuals and text books. "No need for bow and stern lines", he said, and the boat was simply held to the wall by a single slip amidships. What was written in the manuals for a crew of three, could now be done by one. From then onwards descending the canal locks was a singe.
Lock Techniques Lock Techniques
The conventional technique using a crew of 3 The single handed technique

Going upstream and ascending the locks presented a new problem for us. This time we were entering empty locks with 3m high walls, sometimes higher, making the bollards well out of reach. Sending Louise ashore up the wall ladder was out of the question for I daren’t leave the con to handle the warps. From the corner of our eyes we could see some very skilled crews from other boats, throw up a coil of line towards a selected bollard where it would specularly loop itself around the bollard and form a slip. We tried to imitate this to no avail and quickly got ourselves no where. Alas! the French showed us the solution again. Still maintaining the midship warp arrangement, Louise stood at the flybridge and placed this warp in the crook of the boat hook and carefully extended out the pole of the boat hook whilst still holding the tail end of the warp in her other hand. The warp is then simply placed over the bollard and the boat hook is then withdrawn. Louise then passed the slip for me to hold whilst remaining at the con and she did the same procedure with the bow line, but this time holding on to the bow slip herself. This arrangement meant that every bollard was within reach and without the need for a single crew member to go ashore. Unlike a descending lock, we were slipped fore and midships which is necessary in a flooding lock for the inrush of water is very turbulent and can knock the boat about a bit. The more boats in a flooding lock the better and easier it is. Once the lock is flooded, then the warps are simply flicked off the bollards and away you go.

This technique showed that a team of two can negotiate the canals very easily.

Lock Techniques

Using the boathook as a means of placing the warps around the bollards which are kept out of reach- typical when entering an empty lock.
 
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