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Upcoming Events

Week B: Navigation
March 08, 2010 - March 12, 2010
Radar: Original Endorsement
March 08, 2010 - March 12, 2010
Week C: General Subjects (Deck & Safety)
March 15, 2010 - March 19, 2010
Radar Renewals
March 16, 2010
Radar Renewals
March 18, 2010
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WWII Merchant Mariners

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Don't forget the "Belated Thank You to the Merchant Mariners of World War II Act" (S961 & HR23). This legislation needs to be acted upon soon if it is to have any significance. For more information as well as links to Representatives, go to www.usmm.org.

Merchant Mariner Credential

If you have questions about qualifying for the new Merchant Mariner Credential, please contact us.

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Christmas Tree Tow PDF Print E-mail
When the charm of winter snow has worn off (two days after the onset of winter), Hawaii's climate exerts a tug.  So the Questions of this week have to do with the Honolulu (Christmas tree) tow in its pure and modified forms.  These questions appear on Deck General (Book 2) USCG examinations.

 

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The Honolulu (Christmas Tree) Tow

Questions #675 & 1948 (Book 2)


Question #675
An advantage of the modified Christmas Tree towing method is to ________________.
A. increase the towing hawser's catenary and provide more spring
B. reduce catenary, allow operation in shallower water, and release one barge without breaking up the entire tow
C. enable one tug and its crew, without any outside assistance, to make up or break down the tow
D. provide rapid delivery of logs from the northwestern United States to Hawaiian sawmills

The answer is B.   Brady's Tugs, Towboats and Towing describes this tow as
"a tandem tow made up of barges towing in column formation by one or more tugs.The main tow hawser of the tow . . . passes over the fantail of [the] tug downward and astern beneath each barge being towed."
The Honolulu (Christmas Tree) towing arrangement is designed to reduce the catenary which, in shallow waters such as those found on the continental shelf, can easily foul.  Catenary is kept to a minimum as every barge is connected to the main tow wire that passes beneath them.  In the "modified" arrangment, the last vessel is towed separately. 

Question #1948
The Honolulu (Christmas Tree) tow was devised to ____________________.
A. keep the catenary to a minimum
B. allow easy removal of a center tow
C. reduce hawser length
D. increase the catenary

The answer is A. The assistance of another towing vessel is usually required to remove a barge from this arrangement .

 

 

 

In the News

In the News

From "The Times of Malta"Collisions, groundings, piracy, rescues -- bad things, inexplicable things and, as in the freeing of Capt. Richard Phillips, very good things happen.  Here is our record of such events as they come to our attention.   Read More

On the Quarter

On the Quarter

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Barbecues in LaPaz?  Flags of Convenience?  Is 'acronym' an acronym? We are pretty sure our ruthlessly inquisitive father was born to blog, so we've invited him to do it here, in "On the Quarter."    Read More

National Maritime Center

National Maritime Center

uscglogo2The National Maritime Center in Martinsburg, West Virginia, is the US Coast Guard's processing center for all mariner licensing and credential transactions.  The website provides information for new mariners, continuing mariners, returning mariners -- license and STCW requirements, applications, policy and guidance.  It also enables the mariner to check on the status of his or her pending application.  Read More

Regulation Watch

Regulation Watch

capitolMariners increasingly find themselves beset by regulations from a variety of sources.  We will try to alert you here to significant changes (proposed and enacted) to maritime laws, affecting licensing requirements, examination procedures and documentation requirements as found in the Federal Register, USCG Navigation and Inspection Circulars (NVICs), Policy and Guidance Statements. Read More

Towing Licenses

Obtaining a Towing License

p-e-and-tugs-2Over the last several years there have been significant changes in the licensing requirements for operators of towing vessels.  It used to be that licenses authorizing operation on inspected vessels would satisfy the requirements for most towing vessels of lesser or equal tonnage.  This is no longer the case.  There are now several ways to become an officer on a towing vessel, ranging from the entry level Apprentice Steersman to service-in-training while holding a previously issued license.  Read More