3. ADVANCED SONAR OPERATION

3.6Event Mark, Own Ship Position Mark

3.6.1Event mark

The event mark, which requires speed and heading data, is useful for finding the horizontal range, depth and bearing to a location some distance from current position.

Plotting an event mark on the display is equivalent to dropping a buoy with an anchoring chain that extends from surface to bottom. The buoy is fixed at its present geographical location, but the mark on the display moves to a point where present beam plane intersects the anchor chain of the buoy as the ship moves or the tilt angle is changed. This can be said of other marks as well such as fish mark and trackball mark.

 

 

(35)

 

B

Stored when

You observe picture from

EVENT key is

 

pressed.

direction of mark.

A

 

 

 

How to use the event mark

Entering an event mark

1.Operate the trackball to place the trackball mark where you want to place an event mark (latest event mark).

2.Press the [EVENT] key. The horizontal range, depth and bearing to the event mark appear at the bottom left corner of the sonar display.

Event mark position is calculated from ship’s speed and heading data and it moves on the screen with own ship’s movement. With connection of a navigator, the latitude and longitude of the event mark are output to the navigator when an event mark is entered, in NMEA format TLL sentence.

→234 : Horizontal range (m) from own ship mark to mark ↓ 121 : Depth (m) to mark

( 121) : Depth (m) of mark at moment EVENT key is pressed.

B SW/W : Bearing (degree)*

*Bearing format may be selected with EVENT/FISH on the MARKS menu.

**Any value which exceeds 9999 is displayed

with four asterisks (****).

Event mark data, shown at bottom left corner of the display

3-7

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Furuno CSH-5L/CSH-8L Event Mark, Own Ship Position Mark, Event mark, How to use the event mark, Entering an event mark
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CSH-5L/CSH-8L specifications

Furuno CSH-5L and CSH-8L are advanced marine radar systems known for their cutting-edge technology and user-friendly interfaces. Designed primarily for maritime applications, these radar units cater to a wide range of vessels, from commercial ships to fishing boats. The primary distinguishing feature of the CSH-5L and CSH-8L radar systems lies in their ability to provide high-resolution images and precise detection of targets, ensuring navigational safety and operational efficiency on the water.

One of the standout technologies incorporated into both models is the pulse compression technique. This feature significantly enhances target resolution and minimizes blind spots, allowing the radar to detect smaller objects at greater distances. With the CSH-5L and CSH-8L's powerful signal processing capabilities, users can expect exceptional performance even in challenging weather conditions, ensuring reliable operation during storms or fog.

The CSH-5L model operates at a frequency range of 5 GHz, while the CSH-8L uses an 8 GHz frequency. Both radars are equipped with a rotating antenna that provides a wide coverage range, allowing for efficient monitoring of the surrounding marine environment. Their high sensitivity and low noise levels enhance target detection, making them particularly useful for locating small fishing vessels or buoys.

Another important characteristic of the Furuno CSH-5L and CSH-8L is their user-friendly interfaces. Both models feature intuitive controls, allowing operators to adjust settings easily and access critical information quickly. The displays are designed for clarity, enabling users to distinguish between targets and navigate effectively.

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In summary, the Furuno CSH-5L and CSH-8L radar systems represent the forefront of marine radar technology, offering exceptional detection capabilities, user-friendly controls, and robust integration options. Their advanced features ensure that mariners can navigate confidently, making them a vital asset for anyone operating in the marine environment.
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