User manual NORTHSTAR EXPLORER 657

[. . . ] Explorer 657 Fishfinder and Chartplotter Installation and Operation Manual www. northstarnav. com IMPORTANT SAFETY INFORMATION Please read carefully before installation and use. DANGER !It is used to alert you to potential personal injury hazards, Obey all safety messages that follow this symbol to avoid possible injury or death. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury CAUTION indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage. [. . . ] and On a multi-tank boat, select the tank that you have added fuel to. Change the number to the amount of fuel that you added. Note: If you follow procedure B every time you add fuel, then a small error will accumulate, because it is hard to measure exactly how much fuel you add. To avoid this, completely fill the tank and follow procedure A about every tenth time you add fuel. 46 Northstar Explorer 657 Installation and Operation Manual C 1 2 3 When you remove fuel Before removing fuel, go to the Fuel window, press and select Set remaining. On a multi-tank boat, select the tank that you are removing fuel from. Write down the value of Remaining for the tank; this is the amount of fuel originally in the tank. Subtract the amount of fuel you removed from the amount of fuel originally in the tank to calculate the amount of fuel now in the tank. 6 Change the number on the Set Remaining menu to the amount of fuel that you calculated was now in the tank. Press 7 4 5 Note: You can also use this procedure when you add fuel to a tank. In this case, add the fuel you have added to the amount of fuel originally in the tank to calculate the amount of fuel now in the tank. 12-4 Low fuel alarm To set a low fuel alarm for a tank: 1 2 3 Press twice, select Fuel then select Setup tanks. Select Tank alarm and enter a fuel level to trigger the low fuel alarm. When a low fuel alarm is set, the alarm's fuel level is shown on the fuel window tank levels as a red bar. The alarm can also be set using the Alarms setup menu (see section 17-9) 12-5 Boat speed sensors 12-5-1 Selecting a boat speed sensor The fuel calculations can use boat speeds from the GPS, or from a paddlewheel sensor or pitot sensor if these optional sensors are installed: Paddlewheel and pitot sensors measure the speed through the water; GPS speed is speed over ground; these sensors can give different values for Range, Economy and the fuel consumption curves (see section 12-5-2). A pitot sensor is more accurate than a paddlewheel sensor at high speeds but is not accurate at low speeds. A paddlewheel sensor is more accurate than a pitot sensor at low speeds. To select an optional speed sensor 1 2 Press twice, select Fuel and select Speed source. To use a paddlewheel or pitot sensor, select Water speed, otherwise select Ground speed to use GPS speed. If you selected Water speed and you have both a paddlewheel sensor and a pitot sensor: i ii Press , select SmartCraft and select Speed type Select Paddlewheel or Pitot. 3 Tip: You can select a different speed sensor during a trip. Northstar Explorer 657 Installation and Operation Manual 47 12-5-2 Water speed and ground speed A paddlewheel sensor and a pitot sensor measure water speed, the boat speed through the water. A GPS measures ground speed, the boat speed over the bottom of the water. If there is a current, then these speeds will be different, and the log, trip log, economy and range will be different, as shown below. Water speed is better for measuring the boat's potential performance, Ground speed is better for going to a destination because it takes currents into account. To select a speed sensor, see section 12-5-1. When the current is from ahead, ground speed is less than water speed Water speed 10 knots Current 4 knots Gives a ground speed of 6 knots Gives a ground speed of about 8 knots Current 4 knots at 45º Water speed 10 knots For this example: If the boat travels for one hour, uses 3 gallons of fuel per hour and has 50 gallons of fuel left: Speed Using water speed: Using ground speed: 10 knots 6 knots Log 10 nm 6 nm Economy 3. 3 nm / gal 2. 0 nm / gal Range 165 nm 100 nm When the current is from behind, ground speed is more than water speed Water speed 10 knots Current 4 knots Gives a ground speed of 14 knots Water speed 10 knots Current 4 knots at 45º Gives a ground speed of about 13 knots For this example: If the boat travels for one hour, uses 3 gallons of fuel and has 50 gallons of fuel left: Speed Using water speed: Using ground speed: 10 knots 14 knots Log 10 nm 14 nm Economy 3. 3 nm / gal 4. 7 nm / gal Range 165 nm 235 nm 48 Northstar Explorer 657 Installation and Operation Manual 12-6 Fuel consumption curves A fuel consumption curve shows fuel consumption (fuel used per unit of distance travelled) and boat speed as a function of engine RPM. Fuel consumption curves require engine RPM, which requires SmartCraftTM or diesel sensors to be installed. Fuel consumption curves are powerful tools for assessing boat performance in different conditions and for helping you to run at the most economical speed and trim for the conditions. [. . . ] Route: Two or more waypoints linked in sequence to form a course for the boat (see section 6). SmartCraft - A feature of Mercury Marine engines for monitoring engine performance. User card - A plug-in card that stores waypoints, routes and tracks (see section 1-2). UTC - Universal Time Coordinated or Coordinated Universal Time, which is a standard world time, formerly called Greenwich Mean Time (GMT). [. . . ]