Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 14-01-2016, 11:20   #16
Registered User

Join Date: Dec 2015
Posts: 378
Re: How not to read bridge clearance

Quote:
Originally Posted by jackdale View Post
The eyes can fool you.

I'm sorry, I'm entirely a newbie, here, but I never imagined that anyone would try to estimate the height of a bridge by eye. Or trust the published elevations, either, given how much the water level can change.

Calculating elevation given distance and angle is trivial. Are there really many people who'd risk an expensive boat because they couldn't be bothered?
__________________

__________________
Jdege is online now   Reply With Quote
Old 14-01-2016, 11:42   #17
Senior Cruiser
 
jackdale's Avatar

Cruisers Forum Supporter

Join Date: Mar 2008
Location: Calgary, AB, Canada
Posts: 5,048
Images: 1
Re: How not to read bridge clearance

Quote:
Originally Posted by Jdege View Post
I'm sorry, I'm entirely a newbie, here, but I never imagined that anyone would try to estimate the height of a bridge by eye.
It is amazing how many folks do not read charts. Just like the skipper of that cat in the video.

Judging distances and heights at night is very difficult.
__________________

__________________
ISPA Yachtmaster Ocean Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203,204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)
jackdale is online now   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bridge Clearance on the Intracoastal Waterway 2divers Navigation 33 30-12-2015 18:49
US Clearance - Bahamas Clearance Issues AllezCat Rules of the Road, Regulations & Red Tape 2 26-01-2011 17:41
Bridge Clearance of 'Seven Mile Bridge' (South of Boot Key) ? Almost Heaven Navigation 4 18-11-2010 15:20
Leopard 45, Bridge Deck Clearance isi Multihull Sailboats 4 04-02-2007 22:16
What is bridge clearance ona cat? vilanomark Multihull Sailboats 33 16-03-2006 03:40



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:21.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.