Alarm steps of medium and high frequency combined radio station

Every company has different fire regulations. Domestic companies usually: 1 after the bell rings, 1 chimes in the bow, 2 chimes in the stern, 3 chimes in the boat, 4 chimes in the engine room and 5 chimes in the living area.

2. Instructions for the use of the general alarm for ships

Under normal circumstances, maritime search and rescue is aimed at ship accidents. First, when a ship in distress sends out a distress alarm, nearby ships and shore stations will receive the alarm. The nearby ships confirm the alarm or forward it to the shore station, which will forward the alarm to the ships nearby in distress again, and organize the ships to go to the scene to organize search and rescue.

Generally, the first ship to arrive at the scene is the on-site commander, and the on-site situation is sent to the shore platform. At present, the commonly used search and rescue methods are: parallel search and rescue method, that is, several ships sail in parallel for search and rescue; The square search and rescue method is suitable for a ship, starting from the center of the sunken ship, driving in a certain direction for a corresponding distance, then turning 90 degrees, sailing for a certain distance (generally twice as long as the first voyage), and so on; Fan-shaped search and rescue is also suitable for ships, mainly because the steering angle is not 90 degrees but 120 degrees.

The last one is sea and air search and rescue, which requires the assistance of aircraft search and rescue.

3. General alarm system for ships

DSC is a general call system used by ships, which sends distress alarm and general call in the middle and high frequency band, and the shore station sends receiving notice. DSC calls can be roughly divided into distress calls, safe calls and daily calls. In GMDSS ground communication system, the initial distress communication is completed by DSC. DSC provides short-range (VHF), medium-range (MF) and long-range (HF) distress alarms. When calling in distress, automatically switch the transmitter to the set distress frequency and give an alarm according to the set alarm mode.

At the same time, the DSC receiver on duty can automatically receive DSC distress alarm without manual duty, which greatly improves the success rate of distress alarm.

4. General alarm signals for ships

More than two alarm signals are activated.

The acousto-optic alarm can be started directly from the acousto-optic alarm button on the bus panel of the fire alarm host.

You can also find the point address of acousto-optic alarm from the system loop on the host computer, and click Manual Open. In the automatic state of the system, the acousto-optic alarm can also be turned on by linking with more than two point alarms. Audible and visual alarm, also called light alarm, is set up to meet the special requirements of customers for alarm loudness and installation location. At the same time, it sends out two kinds of alarm signals: sound and light. Special product areas: iron and steel metallurgy, telecom tower, hoisting machinery, construction machinery, ports and docks, transportation, wind power generation, ocean-going ships and other industries; It is an accessory product in industrial alarm system.

5. General alarm device for ships

The shaft you mentioned is called the stern shaft in the industry. One end of the stern shaft is connected with the propeller, and the other end is connected with the gearbox or coupling and then connected with the engine. The stern shaft of the ship is mounted on two bearings. One is called stern bearing, which is the part of the hull that is in contact with water. The other is called the front bearing, which is connected with the engine room. There is a stern shaft compartment between the front and rear bearings. It's basically closed, but there won't be air pressure or anything. The sealing of the hull depends on the sealing rings installed next to the front and rear bearings. The sealing ring is a closed rubber ring sleeved on the shaft. Generally speaking, the front and rear bearings have several sealing rings. Both sealing rings are filled with oil, which comes down from the oil tank with a certain height, that is, the gravity oil tank, which can balance the pressure of water and oil can lubricate the sealing rings. Reduce the wear speed of rubber ring. In fact, the industry is called tail seal and front seal. If the tail seal leaks and the water pressure enters between the two sealing rings, which causes the oil level in the gravity tank to rise, the monitoring and alarm system will give an alarm, and then the crew will know that there is something wrong with the tail seal. The front seal is connected with the engine room, so the water inflow problem is not big. However, if the front sealing ring is damaged and the sealing oil leaks out, resulting in a drop in the oil level of the gravity tank, the monitoring system will give an alarm, and then the crew will know that there is something wrong with the front sealing.

6. Detection of general alarm for ships

This program is suitable for the first verification, subsequent verification and in-service inspection of general A-type pulse reflection ultrasonic flaw detector. Ultrasonic flaw detector is mainly composed of synchronization, scanning, transmitting, receiving amplification, power supply and other circuit parts and display screen, and can be equipped with delay, alarm, depth compensation, marking, tracking and recording units. Matching with ultrasonic probe, it is widely used for nondestructive J inspection of boilers, high-pressure vessels, ships, aerospace, railways, bridge construction, chemical machinery, metallurgy, raw materials and so on.

7. What is the general alarm on board?

Ocean freighters have no police; In case of disputes and conflicts between the crew on board, the captain and the political commissar shall handle them. If they can't exchange goods, they will bear the cost of returning to China, and domestic companies will be investigated and dealt with.

8. Video used by ship general alarm.

1On October 9th, 65438 officially launched a brand-new alarm mode-Internet video alarm. In the future, when people are in danger, they can call 1 10 or use1210 to give an alarm, and they can download the mobile phone APP "Public Security 1 10" for internet video alarm, which not only can

9. What are the general alarm methods for ships?

The general marine alarm system consists of smoke detector, temperature detector, manual alarm button and alarm controller.

The general alarm button on the ship can send out various common alarms on the ship:

1. Comprehensive response: alarm bell and whistle sounded for 30s.

2. Fire alarm: the alarm bell and whistle sound 1 min. In order to indicate the fire location, after the fire alarm signal is issued, one sound indicates the front, two middle parts, three rear parts, four engine rooms and five superstructure decks of the ship.

3. Leakage stoppage: the duration of alarm bell and whistle is short 1 min.

4. Man overboard: the alarm bell and whistle will sound three times, lasting for 1 min.

5. Ship abandonment: the alarm bell and whistle sounded seven short and one long, totaling 1 min (SOLAS Convention stipulates that seven short and one long).

6. Pollution prevention: alarm bells and whistles are short, long and short 1 min.

7. Disarm the alarm: the alarm bell and whistle sound for 6 seconds.

Among them, the whistle is mainly used for ship control signals and fog signals, and can also be used as an alarm bell.

10. Ship warning light

The control panel is broken. See if there is a test key on the control panel. If yes, press the test key to restore the settings and try!

1 1. Handling of false alarm of ship

The cause of the alarm error when the ship is in distress may be the background system problem, the network problem or the real mistake.

Extended: Ship distress alarm mode

Release red flame signal, rocket parachute flame signal, smoke signal, etc. EPIRB can be opened manually in case of distress. If it is too late to start launching, the hydrostatic pressure releaser will automatically release and open when the ship sinks to a certain depth, and send out detailed position information and ship information for help through the satellite, so that the search and rescue ship can arrive nearby. When receiving the radar trigger signal, SART will play the role of position indication. When there is a satellite signal, the satellite phone can communicate like a mobile phone and report the danger to the shore station. Report by VHF or cell phone.

2022- 1 1-29 answer

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