3. STEERING MODES

SPIRAL

The boat will spiral in the direction of current heading (STBY), set course (AUTO) or the course to the next waypoint (NAV) that was active at the moment that the SPIRAL mode is selected. The radius of the “spiral” can be set in the menu. This is same as RADIUS OF ORBIT.

In the NAV mode, the boat steers toward the waypoint (s) spirally. Note that the NMEA0183 sentence AAM is required from the plotter, and the arrival alarm range must also be set on the plotter.

Note 1: In the NAV mode, the SPIRAL deactivates the manual waypoint switching. (See paragraph 3.3.3.)

Note 2: If the boat does not enter the arrival alarm area, it may not be switched to the next waypoint. Set the arrival alarm range as large as possible and activate the perpendicular function on the plotter connected.

The boat will continue to orbit until the [AUTO] or [STBY] key is pressed.

SPIRAL starting position

d (radius of orbit)

Orbit of the center of spiral

L

(Distance between centers of spirals, see next page.)

Example of spiral maneuver in turn mode

To execute the spiral, do the following.

1.Press the [MENU] key to show the main menu.

2.For AUTO or NAV mode, rotate the course control knob to select the “SPIRAL SPEED.”

For STBY mode, select “PARAMETER SETUP” in the main menu, and then press the course control knob to show the PARAMETER SETUP menu. Select “SPIRAL SPEED” in there.

3.Press the course control knob.

The current value is circumscribed with a double rectangle.

4.Rotate the course control knob to set the spiral speed (Setting range: 0.1 to 8.0 kt.), and then press the [MENU] key twice in that order.

Refer to the formula in below to set the radius of orbit and spiral speed.

6.28 d (radius of orbit: nm)

Vc (spiral speed: kt)

L (distance between centers of spiral: nm) =

Vs (ship’s speed : kt)

3-12

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Furuno NAVpilot-500 manual Spiral, Example of spiral maneuver in turn mode
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NAVpilot-500 specifications

The Furuno NAVpilot-500 is an advanced autopilot system designed for a range of vessels, from small boats to larger commercial ships. This cutting-edge technology provides reliable steering assistance, ensuring enhanced navigational safety and improved operational efficiency. With its versatile functionalities, the NAVpilot-500 has made a significant impact in the maritime industry.

One of the standout features of the Furuno NAVpilot-500 is its use of FURUNO's proprietary technology, including advanced sensors and algorithms. This system leverages a dual-processor architecture, allowing for seamless performance in diverse sea conditions. The NAVpilot-500 is capable of handling course control with impressive precision, adjusting automatically to wind and waves to maintain a steady course.

Another notable aspect of this autopilot system is the intuitive user interface. The large, sunlight-readable display provides easy access to all functionalities and settings, making it user-friendly for operators of varying expertise levels. The touchscreen interface allows for straightforward navigation through menus, ensuring that users can quickly adapt to changing conditions on the water.

The NAVpilot-500 features a comprehensive set of integration options, including compatibility with various types of navigation and communication equipment. This capability allows for effective integration with Furuno's proprietary chart plotters and radar systems, ultimately enhancing situational awareness and safety while navigating.

Moreover, the system offers customizable autopilot modes, including modes for auto and standby operation. This versatility allows users to choose the most suitable steering method for their specific needs, whether for leisurely cruising or during heavy-duty fishing operations. The NAVpilot-500 also incorporates advanced safety features, such as target tracking and collision avoidance, ensuring that operators remain vigilant and prepared for any potential hazards.

Furuno's NAVpilot-500 is engineered for durability and reliability, meeting the rigorous standards set by the maritime industry. Robust construction allows it to withstand harsh marine environments, providing peace of mind to operators. With its blend of advanced technology, user-friendly design, and reliable performance, the NAVpilot-500 stands out as one of the leading autopilot systems in the market today. Whether for leisure or professional use, this system brings a level of sophistication and safety that enhances navigation experiences across various maritime applications.
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