--三副

Handheld two-way very high frequency wireless telephone for lifeboats and rafts.

1. The two-way very high frequency wireless telephone for life rafts (hereinafter referred to as two-way wireless telephone) should be able to be used for on-site communication between life rafts, between life rafts and ships, and between life rafts and rescuers. If operated at an appropriate frequency, it can also be used for onboard communication.

2. A two-way wireless telephone should at least include:

(1) 1 complete set of transceiver including antenna and battery;

(2) 1 complete control device including button type launch switch;

(3) 1 set of built-in microphone and speaker.

3. Bidirectional wireless telephones should:

(1) Can be operated by unskilled personnel;

(2) Can be operated by personnel wearing gloves specified for diving suits in Article 33, Chapter 3, Part 4 of the International Navigation Ship Statutory Inspection Technical Regulations of this bureau;

(3) Besides channel selection, it can be operated with one hand;

(4) Can withstand falling from a height of 1m onto a hard surface;

(5) Maintain water tightness at a depth of 1m for at least 5 minutes;

(6) When subjected to a thermal shock of 45 ° C under specified immersion conditions, the equipment can still maintain water tightness;

(7) Not excessively affected by seawater or oil;

(8) There are no sharp protrusions that can damage the lifeboats and rafts;

(9) Small size and light weight;

(10) Capable of working in the presence of environmental noise that may be encountered on board ships or life rafts;

(11) A device attached to the user's clothing should also be provided with a wristband or neckband. For safety reasons, appropriate weak connections should be installed on these straps to prevent danger to users in special circumstances;

(12) Long term exposure to sunlight without deterioration;

(13) The color should be bright yellow or orange, or marked with a yellow or orange band around it.

4. Bidirectional wireless telephones should be able to operate on 156.800MHz (VHF16 channel) and at least one additional channel.

5. All channels are only capable of single frequency voice communication.

6. The transmission level shall comply with the provisions of Appendix 19 of the Radio Regulations.

7. Controllers and indicators shall comply with the following regulations:

(1) The key should be equipped with a prominent device that keeps the wireless telephone in the on state;

(2) There should be a manual volume control on the receiver to adjust the volume output;

(3) There should be a noise control device and a channel selection switch;

(4) Channel selection should be easy to make, and channels should be easy to identify;

(5) The channel display should comply with the requirements of Appendix 18 of the Radio Regulations;

(6) Can indicate that channel 16 has been selected under normal ambient lighting.

8. The device should be able to operate within 5 seconds after startup.

9. The equipment should not be damaged due to open or short circuits in the antenna.

10. The effective transmission power should be at least 0.25W. If the effective transmission power exceeds 1W, it is required to set up a power reduction switch to reduce it to 1W or lower. When the device provides communication services to the ship, the output power should not exceed 1W on these frequencies.

The sensitivity of the receiver should be equal to or less than 2 μ V.

The anti-interference capability of the receiver should ensure that the useful signal is not severely interfered by useless signals.

13. The antenna should be vertically polarized and omnidirectional in the horizontal plane. The antenna should be suitable for effectively transmitting and receiving signals at the operating frequency.

14. The output volume should be audible in the noise environment typically encountered on board or in lifeboats and rafts.

15. In the case of transmission, the output of the receiver should be in a silent state.

16. The equipment should be designed to operate within a temperature range of -20 ° C to+55 ° C. The device should not be damaged when stored within the temperature range of -30~+70 ° C.

17. Power supply for two-way wireless telephone:

(1) The power supply should be integrated into the device and replaceable by the user. In addition, measures can also be taken to operate the device using an external power source;

(2) Devices with replaceable power sources should be equipped with a dedicated primary battery for use in emergency situations. The battery should have an irreplaceable lead seal to indicate that it has not been used;

(3) Devices with non replaceable power sources should be equipped with a primary battery. Handheld two-way wireless telephone devices should be equipped with an unchangeable lead seal to indicate that they have not been used;

(4) The capacity of the primary battery should be sufficient to ensure that it can operate at its maximum rated power for 8 hours at a working cycle of 1:9. The working cycle is defined as 6 seconds of transmission, 6 seconds of reception above the mute enable level, and 48 seconds of reception below the mute enable level;

(5) The original battery should have a storage life of at least 2 years. If it is marked as replaceable by the user, it should have the color or logo specified in Section 3 (13) of this appendix;

(6) Batteries that are not intended for use in distress situations should be painted in another color or marked with another symbol to avoid confusion with batteries intended for this purpose.

18. In addition to indicating other prescribed identification marks, simple operating instructions and the expiration date of the original battery should also be clearly marked externally.

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