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Maritime Manual

The Manual for Use by the Maritime Mobile and Maritime Mobile-Satellite Services is published in accordance with Article 20 (No. 20.14) of the Radio Regulations and results from studies carried out in the ITU-R since 2008. Volume 1 provides descriptive text of the organization and operation of the GMDSS and other maritime operational procedures, while Volume 2 contains the extracts of the regulatory texts associated with maritime operations.
Now available (CD or Hard-copy).

Useful articles



The simplest converter is a trans-former, transforming or converting one voltage into another voltage, for instance 440 V into 110 V.
Transformers have losses, as heat is produced during this conversion. The efficiency is usually between 90 and 98 percent, depending on size, a reason to avoid transform¬ers in power distribution systems