This SAE Standard establishes the procedure for determining the operator duty cycle sound pressure level Lodc to which operators of powered recreational craft up to 24 m in length are exposed during typical operation as determined by marine engine duty cycle studies. This document describes the instrumentation, the required calibration procedures, the test site, the specifications for “standard craft”, the craft operating conditions, microphone positioning, test procedure, engine speeds for each of the Duty Cycle modes and the formula and table for calculating the Duty Cycle operator ear sound pressure level.
This document is subject to change to keep pace with technical advances as well as other international standards and practices.
Changes in this Revision: The sound pressure level measurements performed while applying this document are based on the Five-Mode Marine Engine Duty Cycle instead of a single engine speed. A calculation is required to obtain the Duty Cycle operator ear sound pressure level (Lodc). Provisions for type testing are provided along with specifications for Standard Craft.
Rationale
The original version of SAE J1281 provided only an estimate of operator exposure level and is outdated in terms of usefulness given new international legislation along with existing OSHA guidelines. The revised procedure has a broad range of applications with regard to domestic and international applications. Given the wide variety of craft/motor combinations the original procedure essentially implied that each and every craft/motor combination sold to the public should be tested to ensure compliance with noise exposure requirements/guidelines prior to marketing and sale of the craft to the public.
Marine manufacturers are now required to certify the operator sound exposure level as specified by the Machinery Directive in the EU. Using this revised procedure manufacturers are provided with the means of establishing the actual sound exposure level in a “Standard Craft”. As a result, this procedure can be utilized to certify powered recreational craft in terms of operator sound exposure level prior to marketing and sale of the product.
A manufacturer who certifies and publishes sound exposure data is essentially informing the public, including their customer base, of the actual sound pressure level to which an operator is exposed as a result of operating a specific marine propulsion system in a “Standard Craft”. Full disclosure of this data when in compliance with noise exposure guidelines/requirements can be a major benefit to the public safety and welfare.
The Marine Technical Committee develops and maintains SAE Standards, Recommended Practices and Information Reports for the development, production, application and testing of marine vehicles and equipment. The committee also maintains liaison with the American Boat & Yacht Council (ABYC), Canadian Coast Guard (CCG), International Council of Marine Industry Association (ICOMIA), International Organization for Standardization (ISO), National Fire Protection Association (NFPA), National Marine Manufacturers Association (NMMA), United States Coast Guard (USCG), and other organizations as necessary. The subcommittees formed under the committee's direction include: Marine Engine Fuel Systems Marine Electrical Systems Participants in the SAE Marine Technical Committee include OEMs, suppliers, consulting firms, government and other interested parties.
* Redlines comparisons are available for those standards
listed in the Revision History that contain a radio button. A
redline comparison of the current version against a revision is
accomplished by selecting the radio button next to the standard and
then selecting 'compare'. At this time, Redline versions only exist
for some AMS standards. SAE will continue to add redline versioning
with ongoing updates to SAE MOBILUS.
This modal will allow the user to download citation information or export specific fields of data into one of three file formats: Excel, comma-separated values, or text.
You are currently not logged into your Dashboard account, which is required for annotating.
Please select Login to login or register for the Dashboard. Select Continue to view the content without the ability to annotate.
Redline Warning
You are currently not logged into your Dashboard account, which is required for annotating.
Please select Login to login or register for the Dashboard. Select Continue to view the content without the ability to annotate.
SAE Journal Subscriptions are available in a variety of options, which include electronic, electronic with back file, and archive. For detailed information and options, please complete the following:
Content Request
Check My Access!
You may already have access to the Ground Vehicle Standard, Operator Sound Pressure Level Exposure Measurement Procedure for Powered Recreational Craft
Subscription Access
If you have Subscription Access with a username and password, please login below.
Institutional Login
If you have Institutional Access to SAE MOBILUS, using a predetermined organizational login utilizing single-sign-on (Shibboleth), please login below. To request institutional access to SAE MOBILUS, please complete the institutional subscription information form.
Purchase
If you do not have access to SAE MOBILUS via username/password or institutional access, you can still purchase the Ground Vehicle Standard, Operator Sound Pressure Level Exposure Measurement Procedure for Powered Recreational Craft.
Search Tips: Search Operators:AND, OR, NOT; Wild Cards; Using Quotes
SAE MOBILUS® Search Tips
Please note: All terms not contained within quotes, will be evaluated using the OR operator. This means that your search results will contain all results that contain ANY of the entered terms.
AND, OR, NOT
SAE MOBILUS supports the use of the AND, OR and NOT BOOLEAN operators ONLY function with the Advanced Search.
Wild Cards
Using the asterisk, ( * ) allows you to search for a partial word. For example, entering a keyword search of aero* will search for any word beginning with aero.
Using the question mark, ( ? ) allows you to search for a word with a single character wildcard. For example, searching for t?re would match both tire and tyre
Using Quotes
Words in double quotes " " are treated as a phrase. Conducting a search for "heat model" will return all results in which the exact phrase "heat model" is found, while "heat modeling" would NOT be included.
A term combined with a phrase will be joined with an OR operator.
Searching for Standards
When searching for a standard please use the entire Document Number assigned, which includes the abbreviation. A space can be used, or omitted between the abbreviation and number.