oil slick calming seas - SailNet Community
Seamanship & Navigation Forum devoted to seamanship and navigation topics, including paper and electronic charting tools.

Reply
 
LinkBack Thread Tools
post #1 of 13 Old 06-23-2005 Thread Starter
Senior Member
 
Join Date: Jan 2003
Location: Severna Park
Posts: 441
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
 
oil slick calming seas

Has anyone heard of deploying oil upwind in heavy seas to calm the sea state? Sounds ludicrous, right? I thought so too (and still am inclined to believe it), but I have read this piece of advice in enough otherwise reputable tomes on heavy weather to wonder if there isn''t something to it. Could there be some principle of physics at work here (petrol/oil being lighter than water, etc. etc) than I''m unaware of?

I don''t really think I''d ever try such a thing (wouldn''t I have a couple of dozen other more pressing concerns at a time like that to be doing?). Just curious
sneuman is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 13 Old 06-24-2005
Senior Member
 
Join Date: Dec 2001
Posts: 360
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
 
oil slick calming seas

It has been shown to work. It does so by reducing the friction over the sea surface. However, above a certain wind level, those frictional effects are overcome, and the sea will not calm till the wind dies down.

~ Happy trails and sails to you ~ _/) ~
928frenzy is offline  
Quote Quick Reply Share with Facebook
post #3 of 13 Old 06-24-2005
Catalina 38 Avantura
 
duffer1960's Avatar
 
Join Date: Aug 2000
Location: Michigan
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 15
 
oil slick calming seas

I think it just keeps the spray down.
duffer1960 is offline  
Quote Quick Reply Share with Facebook
post #4 of 13 Old 06-24-2005
Senior Member
 
RichH's Avatar
 
Join Date: Jul 2000
Location: Pennsylvania
Posts: 3,387
Thanks: 23
Thanked 142 Times in 132 Posts
Rep Power: 15
 
oil slick calming seas

Oil changes the surface tension of the water. This benefit retards the tendancy of a wave to become unstable and ''break'' (the top falling off and cascading in front of the wave). Its the breaking wave that does the damage to boats/ships .... the broken wave is full of air/foam, thus the boat sinks deeper into the water (water/air mixture) as it receives more ''side forces'' from the on rushing (higher velocity) water. A solid non-breaking wave will allow the boat to stay on top of the water, etc. so that the side forces that can cause the boat to roll over, etc. are minimized. A non breaking wave only has ''recirculating'' velocities - the wave moves but the water doesnt. A breaking wave can have large horizontal velocities (hence, forces), the larger the ''speed'' of water the larger the force.
RichH is offline  
Quote Quick Reply Share with Facebook
post #5 of 13 Old 06-24-2005
Catalina 38 Avantura
 
duffer1960's Avatar
 
Join Date: Aug 2000
Location: Michigan
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 15
 
oil slick calming seas

Thanks. That is interesting to know. I guess I was kinda'' close, sort of.
duffer1960 is offline  
Quote Quick Reply Share with Facebook
post #6 of 13 Old 06-24-2005
Senior Member
 
Join Date: Jan 2003
Posts: 339
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
 
oil slick calming seas

I discharge of oil on the water can be illeagle so make sure you aren''t breaking any laws... But then again oil discharge is a bad idea any time so rethink the idea and live with a bit of rough water..
jbanta is offline  
Quote Quick Reply Share with Facebook
post #7 of 13 Old 06-26-2005
Senior Member
 
Join Date: Dec 2004
Posts: 210
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
 
oil slick calming seas

RichH Ask a proffesor what time it is and he will tell you how to build a watch.As always you have some of the best tech talk here.Good descriptions.I wonder if the captain of the Valdez was employing these methods.LOL
dman is offline  
Quote Quick Reply Share with Facebook
post #8 of 13 Old 06-29-2005
Senior Member
 
Join Date: Oct 2002
Posts: 224
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
 
oil slick calming seas

I''ve heard of fish oil being used, which is biodegradable.
flicker is offline  
Quote Quick Reply Share with Facebook
post #9 of 13 Old 06-29-2005
Senior Member
 
Join Date: May 2002
Posts: 2,680
Thanks: 6
Thanked 31 Times in 29 Posts
Rep Power: 14
 
oil slick calming seas

As I recall, K. Adlard Coles, in his book "Heavy Weather Sailing," had the opinion that oil does have a calming effect on the sea, but that a stormy sea dissipates oil so quickly that the small amount that might be carried on a small boat would have a very short-lived effect and be of little practical use.
Sailormon6 is offline  
Quote Quick Reply Share with Facebook
post #10 of 13 Old 07-17-2005
Junior Member
 
Join Date: Feb 2005
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
oil slick calming seas

I''ve never tried it, but a couple older sailing books I''ve read discuss the idea of devising a drip feed of oil...possibly through the head or sink. I think that would only be considered in quite a sustained, serious storm, not as a way to not have to deal with some annoying bad weather. It comes after heaving to, storm or no jib, double reefing, and deploying a drift anchor.

-Marty (Vancouver)
Marty Levenson is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
slight oil slick in diesel engine exhaust mcagney Gear & Maintenance 7 04-04-2013 01:15 AM
High Tech on the High Seas Epiphany General Discussion (sailing related) 3 01-25-2004 02:32 PM
Seven Seas Gathering wcshedd Cruising & Liveaboard Forum 1 09-09-2003 04:28 AM
A/C on the high seas acmecoyote General Discussion (sailing related) 4 10-26-2002 03:28 PM
Brewer / Three Seas pedalboat Boat Review and Purchase Forum 0 01-24-2002 06:21 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome