Range of products and services offered by Shipaxis

Shipaxis Technical Services













Range of products and services offered by Shipaxis Technical Services, Mumbai, India

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Load test or capacity test of a GMDSS battery

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LOAD TEST OR CAPACITY TEST OF A GMDSS BATTERY (24VDC) Over the years of experience as a radio surveyor, it has been observed that the most common mistake that the ship staff does is the maintenance of the GMDSS battery (reserve source). This emergency source is often misunderstood for compliance. In a nutshell let us have a look into what is this emergency source is all about: As per SOLAS regulations it is mandatory for all vessels built after 1995 to have on board an emergency generator. Older ships might have an emergency generator or a battery bank as emergency source. When we speak of sources of energy it is as below:  Main source of energy - Main Generator. emergency source - This supplies power to emergency lights and other applications on board and it is  not the one supplying power to GMDSS equipment. The reserve source of energy is normally a 24V DC - lead acid battery which primarily caters to the communication equipment needs only. The AH capacity o
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Calculation of Load current in GMDSS battery

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How to calculate Drain Current and GMDSS battery life during GMDSS SRC Under normal circumstances, it is but natural for the ship staff to get confused with the drain current of GMDSS equipment during survey. This often leads to complicated situation where  a proper explanation becomes crucial to convince the Class surveyor especially if the battery is more than two years old. As per IMO, the GMDSS battery (reserve source) should be replaced once in 3 years irrespective of the condition of the battery after three years. The battery has to be subjected to a capacity load test (similar to your daily routine and weekly routine) once in a month. This is basically done by connecting 6 x 100W DC bulb in series connected to the GMDSS battery. Let us look into a  situation as follows: 1. the above load is connected and 0900 hrs (lt) - Specific gravity and the voltage is recorded at this time. 2. At an interval of 30 minutes, the specific gravity and the voltage has to b
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Safety Radio Survey (aka) SRT/SRC and or GMDSS Radio Survey

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Safety Radio Survey (aka) SRT/SRC and or GMDSS Radio Survey In a series of articles that is about to follow in the topic GMDSS Radio Survey or commonly known as SRT or SRC, we intend  to highlight the importance of the GMDSS radio communication equipment on board the vessel and how to prepare the station for Survey. The author of this blog is a 2nd Class COP certificate holder from Government of India, Ministry of Communications and has sailed for over 20 years as Radio Officer and is also a very well know Radio Surveyor with all leading IACS societies in India, viz, Class NK, DNV GL, Lloyds, ABS, BV, IRS etc. Let us start with the basic requirements that has to be in place prior to the Class surveyor's visit to the vessel to carryout GMDSS Survey DOCUMENTATION:  the  following ITU documents  are mandatory to be present on board during the radio survey:- List of Coast Stations - by ITU - Latest edition List of Ship Stations - By ITU - Latest edition List
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