AS NZS 4869.4:2015 pdf download.Maritime survivor locating systems (MSLS) Part 4: Maritime low power personal locating devices employing Automatic ldentification System (AIS).
General requirements
Construction
The manufacturer shall provide evidence that all requirements in clause 4 are fulfilled.
In all respects, the mechanical and electrical design and the construction and finish of the equipment shall conform with good engineering practice.
The equipment shall be designed to minimize the risk of internal and external damage during use or stowage.
The exterior of the equipment shall have no sharp edges or projections that could easily damage inflatable rafts or injure personnel.
The general construction and method of operation shall provide a high degree of proof against inadvertent operation due to magnetic influences, handling, stowage and transit, whilst still providing a simple means of operation in an emergency.
The equipment shall he portable. lightweight, compact and be designed as one integral unit. The locating device shall derive its energy from a battery forming a part of the equipment and incorporate a permanently attached antenna which may be either fixed length or extendible.
The locating device may be fitted with a test facility by which the functioning of the transmitter and battery can be easily tested without the use of any external equipment.
The equipment shall he capable of being used by an unskilled person.
The locating device shall he watertight to a depth of I m (see clause 7.13).
The equipment shall not be unduly affected by sea water or oil and shall be resistant to deterioration by prolonged exposure to sunlight.
A substantial part of the equipment shall be of highly visible yellow or orange colour to assist visual location.
Categories of equipment Two categories are defined:
• Category I locating devices shall have sufficient positive buoyancy to float in fresh water.
• Category 2 locating devices intended to be incorporated into or attached to a buoyancy aid are not required to float.
Category I locating devices that can float free may have a lanyard to attach them to a person or life vest. Where a lanyard is employed it shall meet the requirements of IMO MSC. 149(77) [8j, paragraph 2.3.11. The user tuanual or instructions shall include necessary intbrmation to allow the user to properly attach the locating device lanyard.
The user manual or instructions for Category 2 devices shall include necessary information to allow the user to fit or attach the locating device to a buoyancy aid.
4.2 Controls
The equipment shall be initially activated by the use 01 two simple, but independent mechanical actions, neither ol which on its own shall activate the equipment. The second mechanical action may be replaced by an immersion sensor. Where the second action is replaced by an immersion sensor then the first action shall be an arm function thus to ensure the device is armed lbr automatic activation when submerged.
It shall oniy be possible to activate the equipment after a seal or other mechanical restraint has been reiuovcd from the first mechanical action. For devices without an arm function it shall not be possible to reattach a removed seal or restrain. After activation it shall be simple to dc-activate the equipment and the means to deactivate the equipment shall he clearly marked.
The switch that operates any test facility (clause 4. 1) shall be so designed that it returns automatically to the off-position when released.
5.Technical requirements
5.1General
When activated the locating device shall he capable of transmitting messages that indicate the position of a person in the water. The transmitted messages shall he compatible with existing AIS installations. The transmitted messages shall he recognized and displayed by AIS receivers in the reception range of the transmitter, and clearly distinguish the transmitter as a personal Man Over-Board (MOB) locating device. AIS TDMA Synchronization shall be UTC direct; the locating device does not require an AIS receiver.
AS NZS 4869.4 pdf download.