Heading Alignment, Heading alignment

3.2 Heading Alignment

You have mounted the antenna unit facing straight ahead in the direction of the bow. Therefore, a small but conspicuous target dead ahead visually should appear on the heading line (zero degrees). In practice, you will probably observe some small bearing error on the display because of the difficulty in achieving accurate initial positioning of the antenna unit. The following adjust- ment will compensate for this error.

Correct bearing	α
relative to heading

α Target

Antenna mounted error to port (HDG SW advance)

340	350	000	010	020
330				030
320				040
310				050
300				060
290				070
280				080
270				090	Apparent
260				100	Apparent
250				110	position
					position
240				120	of target
				120
230				130
220				140
210				150
200	190	180	170	160

Picture appears deviated clockwise.

Apparent position	β
of target

β	Target	340	350	000	010	020
		330				030
		320				040
		310				050
		300				060
		290				070
		280				080
		270				090	Correct
		260				100	Correct
		250				110	bearing
		230				130	relative to
		240				120
		210				150	heading
		220				140
		200	190	180	170	160

Antenna mounted error	Picture appears
to starboard (HDG	deviated counterclockwise.
SW delayed)

Heading alignment

1.Select a stationary target echo at a range between 0.125 and 0.25 nm, preferably near the heading line.

2.Operate the EBL control to bisect the target echo:

a)Roll the trackball to place the arrow in the EBL1 or EBL2 box (at bottom left corner), whichever EBL you want to use.

b)Push the left button to turn on the EBL.

c)Push the left button again to send the cursor inside the effective display area.

d)Roll the trackball (coarse adjustment) or spin the thumbwheel (fine adjustment) to bisect the target with the EBL.

3.Read the target bearing.

4.Measure the bearing of the stationary target on the navigation chart and calculate the difference between actual bearing and apparent bearing on the radar screen.

5.Left-click the MENU box at the right side of the screen to close the menu.

3-2

FAR-2157 specifications

The Furuno FAR-2157 is a cutting-edge radar system specifically designed for marine applications, offering superior performance and advanced features. As part of the renowned FAR series, the FAR-2157 stands out with its impressive capabilities, making it essential for navigating both commercial and leisure vessels.

One of the main features of the FAR-2157 is its 12 kW transmitter, which facilitates long-range detection and precise target tracking. The radar operates on the X-band frequency, ensuring high-resolution imagery and outstanding target separation in various conditions. This enables operators to detect small targets and navigate safely, even in congested waters.

Equipped with Furuno's advanced Digital Signal Processing (DSP) technology, the FAR-2157 enhances target detection by reducing clutter and improving signal clarity. This results in an increased ability to identify vessels, buoys, and landmasses, thereby greatly enhancing situational awareness. The radar is designed to automatically adjust gain, sea clutter, and rain clutter settings, allowing for consistently optimal performance without the need for constant manual intervention.

Another notable characteristic of the FAR-2157 is its ability to integrate with other onboard systems such as chart plotters and AIS (Automatic Identification System). This integration allows for the seamless overlay of radar data onto electronic charts, enabling mariners to monitor navigation and potential hazards in real time. Additionally, the radar supports the MARPA (Mini Automatic Radar Plotting Aid) system, allowing users to track the movement of multiple targets and predict their future positions, aiding in collision avoidance.

The user interface of the FAR-2157 is designed with simplicity in mind, featuring a large and intuitive display. The menu-driven setup and user-friendly controls ensure that operators can easily access essential functions and settings. Furthermore, the display is sunlight-readable, which is crucial for visibility in bright conditions.

The Furuno FAR-2157 is built to withstand the rigors of the maritime environment. It is equipped with a rugged dome antenna, ensuring durability against harsh weather conditions and vibrations. The system also includes a built-in self-diagnosis function, which helps maintain optimal performance by identifying potential issues before they become critical.

Overall, the Furuno FAR-2157 radar system combines advanced technology with user-friendly features, making it an ideal choice for marine professionals seeking reliable and efficient navigation assistance. With its powerful capabilities, the FAR-2157 enhances safety and efficiency on the water, making it a valuable addition to any vessel's navigation suite.

3.2 Heading Alignment

SW delayed)

Heading alignment

FAR-2157 specifications