SailNet Community - Reply to Topic

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > Skills and Seamanship > Seamanship & Navigation > collision course - Tip
 Not a Member? 

Seamanship & Navigation Forum devoted to seamanship and navigation topics, including paper and electronic charting tools.


Thread: collision course - Tip Reply to Thread
Title:
  

By choosing to post the reply below you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

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:

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.



Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Topic Review (Newest First)
01-03-2003 04:54 AM
Jeff_H
collision course - Tip

I believe that Duane''s post brings up an important point. Under COLREGS The obilgations of the stand-on vessel are as follows:

(ii) The latter vessel (Stand-on)may however take action to avoid collision by her maneuver alone, as soon as it becomes apparent to her that the vessel required to keep out of the way is not taking appropriate action in accordance with these Rules.

(b) When, from any cause, the vessel required to keep her course and speed finds herself so close that collision cannot be avoided by the action of the give-way vessel alone, she shall take such action as will best aid to avoid collision.

In other words, a stand on Vessel is actually allowed to alter course to avoid collision if it is done in a manner that should be obvious to the other vessel. In the case cited by Duanne, by heading up and slowing down to delay a tack, as stand on vessel you have actually done the right thing. COLREGS further lists the following permitted alterations in course to avoid collision;

(c) If there is sufficient sea room, alteration of course alone may be the most effective action to avoid a close-quarters situation provided that it is made in good time, is substantial and does not result in another close-quarters situation.

(d) Action taken to avoid collision with another vessel shall be such as to result in passing at a safe distance. The effectiveness
of the action shall be carefully checked until the other vessel is finally past and clear.

(e) If necessary to avoid collision or allow more time to assess the situation, a vessel may slacken her speed or take all way off
by stopping or reversing her means of propulsion.

Jeff

01-03-2003 03:47 AM
DuaneIsing
collision course - Tip

c172guy,

As to your question about the "stand on" vessel, I agree that it is intended so that the "give way" vessel can have some degree of confidence in you maintaining your present course and speed. I have had a number of circumstances where I was tacking up a narrow waterway in an engineless sailboat (to stay in adequately deep water), and had other boats approach from the opposite direction.

In general, I continued my necessary tacking manuevers during the approach of the other boats (let''s limit it to powerboats to keep it simple), but as we drew closer, I would try to ensure that I would not have to tack into the approaching boat''s path. I can recall times when I was faced with the choice of: maintaining speed which would force me to tack too close to the approaching boat, running aground, or slowing somewhat so I could remain on my current tack until after the other boat passed. I always chose the last option.

Technically, I failed to maintain both course and speed, but it seems like the best option. Any better ideas or comments?

Duane
01-02-2003 09:06 AM
c172guy
collision course - Tip

The relative bearing of the other boat is what I use. If the bearing is constant you are traveling the same course and speed or are on a collision course. Since it is rare to be traveling the same course and speed a constant bearing usually means collision!!! For a bearing I usually pick a point on my boat and use that as a reference. The handheld compass is the best method but usually it is obvious.
I have a question about the right of way rules. Some postings seem to idicate that the stand-on vessel has options as to standing on or not. As I understand the rules standing on is not an option. If you are the stand on vessel and your course change causes an accident you are responsible. Basically the rules are designed so that boats know what other boats will do. This way a passing boat knows that you will hold course so that they know the safest way to pass. A ship knows that a daysailer won''t cut across the channel. Kinda like you know a car will stop at a red light or that a car won''t make a left hand turn in front of you. My reasonong is that a sailboat is not allowed to tack across the front of a passing boat even if it means luffing the sails.
01-01-2003 07:11 AM
maxcontax
collision course - Tip

We were taught to close one eye, extend an arm and hold a finger on the subject vessel and then freeze. If the vessel retreats from the finger you will pass forward, if it advances from the finger you will pass aft, and if the vessel remains on the finger, you are on a collision course.
The method works anywhere at any angle or speed.
06-11-2002 01:35 PM
Denr
collision course - Tip

How about if youíre outside the sight of land? The answer is: take a compass bearing on the other vessel. If the angle decreases, the other vessel will pass in front of you, if the angle decreases, you will pass in front of the other vessel. If speed changes on either vessel the angles will change and the stand-on vessel will be determined according to the pecking order and right-of way-rule.

Pecking order:
Vessel not in command
Vessel restricted in her ability to manuver
Fishing (commercial)
Sailboats(sailing) not under power
Powerboats

In all circumstances, it is incumbent on the skipper to maintain a look out at all times and to observe the rules of right-way as they pertain to the type of vessels involved in the crossing situation.
06-10-2002 10:59 PM
bullseye
collision course - Tip

heres a little tip i learned a long time ago from a teacher while i did a basic beginners sailing course,ive done other more advanced courses since then but never heard this tip since, in any of the latter courses.

its only applicable for sailing in lakes,rivers ,harbours.

if you think your on a collision with another vessel,look at the land behind the other vessel,if the vessel is moving forward in relation to the land behind it,it''ll pass in front of you.

if it appears it''s going backwards in relation to the land behind it(you know the vessel is actually going forward),it''ll pass behind you.

if it appears to be staying stationary in relation to the land behind it,your on a collision course.

just a quick method that takes only seconds,of course this method assumes both vessel holds its course & speed,both of which can change at any time.

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


All times are GMT -4. The time now is 08:42 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.