Captain's Log

Hurricane season and the Mariners 1-2-3 rule

Hurricane-10953 184x184From Paul Squire a Marine Surveyor

Today is the first official day of the Atlantic Basin Hurricane Season and we have already experienced 2 named tropical storms. Any marine surveyor in Florida is getting pretty busy as people are preparing their boats for what could possibly be an intense hurricane season. This may be a good time to review the Mariners 1-2-3 Rule. There some that are saying that we should even revise this rule to reflect the improvements in storm tracking predictions. This rule was established in in the 1970′s and uses weather prediction models from the 1990′s.

1-2-3 rule

The 1-2-3 rule (mariners’ 1-2-3 rule or danger area) is a guideline commonly taught to mariners for severe storm (specifically hurricane and tropical storm) tracking and prediction. It refers to the rounded long-term NHC/TPC forecast errors of 100-200-300 nautical miles at 24-48-72 hours, respectively. However, these errors have decreased to near 50-100-150 as NHC forecasters become more accurate. The “danger area” to be avoided is constructed by expanding the forecast path by a radius equal to the respective hundreds of miles plus the forecast wind radii (size of the storm at those hours).

Courtesy of Wikipedia.

Lee Chesneau, a former Ocean Prediction Center meteorologist, suggest that we revise this rule to reflect these advances:

“The overall skills scores of the NHC for track location which the wind radii extends from, has vastly improved. The 1-2-3 Rule today should include the more accurate skill score data that adds up to about 1 degree of latitude (60nm) at 24 hours, 2 degrees (120nm) at 48 hours, and 3 degrees (180NM) at 72 hours.“

This is something that will be up for discussion and debate as the Hurricane Season continues and. Any marine surveyor should be aware of any changes to this rule to be able to adequately inform their clients during this season.

You can read more about this at the Ocean Weather Services Blog.

We will be publishing an article on what to look for when you survey your boat in preparation for any trips during the season. Captain Paul Squire is a marine surveyor in Fort Lauderdale that offers tips and information. 

Captain Paul F. Squire

Captain Paul F Squire

Insurance Surveys

There are many requirements that an insurance company expects the Fort Lauderdale owner of a vessel to comply with, including a mandatory marine insurance survey. When you need marine consultants in Fort Lauderdale, it would be wise to contact the most widely sought after vessel insurance inspectors in the area, Simex International – Marine Surveyors in Fort Lauderdale.

Menu

Home

About Us

Our Services

Captain Paul F. Squire

Captain's Log

Blog

Resources

Contact Us

Reviews

"Captain Paul did an excellent job . He was prompt and extremely thorough. He was invaluable in helping me make a decision in purchasing a vessel. You won't find anyone better."

Charles Burch

"A customer is the most important visitor. He is not dependent on us. We are dependent on him. He is not an interruption of our work. He is the purpose of it. He is not an outsider to our business. He is part of it. We are not doing him a favor by serving him. He is doing us a favor by giving us the opportunity to do so. -- Mahatma Gandhi"

 

Call us today at 954-854-8181.

We survey any size of vessel.