[Public-List] bridge, locks clearance

[Don Campbell via Public-List]

I have transited  the Welland Canal 36 times (with all bridges  capable, 
when lifted, of clearing freighters, but when down some  are as close to the 
water as 15 feet). To the top of my radio aerial I have allowed 42 feet. 
This has meant that the train bridge crossing the canal  has had to be 
lifted for the Al30. It has a nominal clearance of 40 feet. I have never hit 
a bridge,  but wait until the bridgemaster gives the green light for travel. 
The best advice I can give is to communicate with traffic control if it a 
big canal system, or the lockmaster or bridgemaster if it is  a smaller 
system, to check the variability and possibilities of water level 
adjustments before you or they get into trouble. I have also seen one 
freighter onto which they dropped a bridge to the deck, resulting in a 
massive fire which was beyond the reach of normal fire equipment, and hence 
the loss of that ship. Not a pretty sight (or smell). Care before is better 
than picking up pieces.
Don

-----Original Message----- 
From: via Public-List
Sent: Thursday, July 30, 2015 1:15 PM
To: public-list at lists.alberg30.org
Subject: [Public-List] bridge, locks clearance

Greetings,

I am planning a cruise involving transiting a lock with a height clearance 
of 42 feet (12.8 meters) .  I saw in the archives several references to mast 
height being 35 feet thereabouts, does anyone know total heigth of an A30 
from waterline?

As always, thank you for your input!

Cheers,

Maurice
Avoca 322
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