Frequently Asked Questions

 

Q: Where can I buy ONWA Marine Electronics products?
A: You can locate a dealer by clicking here or You can send us your order via our inquiry box on the Contact Us page.
Q: How can I update my maps on my ONWA devices?
A: To update your maps in your ONWA devices, please follow the steps indicated in this link.
Q: What is the "MOB" (Man Overboard) feature on my device?
A: Man Overboard (MOB) feature records position at time of man overboard and provides continuous updates of range and bearing when navigating to the MOB position. This is a common feature for Marine GPS Navigators and Plotters. Once the MOB button is pressed, the device automatically marks the current location of the vessel to a waypoint and draws a Go To line to enable you to get back to the MOB waypoint.
Q: What is K-Chart and it's advantages?
A: K-chart is a mapping system developed by ONWA Marine Electronics. The features of K-chart is almost the same as the C-Map mapping system. ONWA’s K-chart system displays worldwide Electronic Charts that provides ease for Marine Navigation. It is the built-in mapping System exclusively offered for ONWA Marine Electronics Products particularly in-line with ONWA’s GPS Plotter KP-XX99 Series. The K-chart mapping system is an alternative choice with the C-Map which gives the user an advantage of enjoying ONWA chart plotters FREE of charge. For now, K-Chart is only limited to Asian countries but ONWA is on the process of expanding the K-chart coverage. By the end of this year (2013) South America and Middle East will already be included in the K-Chart Coverage.Features Include:
  • Depth Classification shows the depth information and the colors make it easy to distinguish different water depths. Light blue color shows greater depth while darker blue color shows shallow depth.
  • Country Datashows which close country you are heading and the country you would want to travel.
  • Elevation Contour Lines are provided in order to see elevations and depth area.
Q: What transducer should i buy?
A: ONWA Marine Electronics offers a variety of transducers. The method and type of mounting is sometimes the most important deciding factor for choosing a transducer. There are three types of mounting styles:
  • The "Transom-Mounted" transducer is externally mounted on the transom whereby the face of the transducer makes direct, unobstructed contact with the water.
  • The "Through-Hull" transducer is permanently installed in a BIG "through-hull" hole made completely through the bottom of a boat hull.
  • The "In-Hull" type transducer is mounted inside of the hull, usually in a bilge, sump or keel, permanently adhered to the cockpit side of the hull with an epoxy or may be contained in a liquid reservoir (generally a density inconsistent with that of water).
Q: Why is my radar not receiving signals as far as it previously did?
A: The problem is probably caused by the magnetron. For technical support, please contact ONWA Marine Electronics or our Authorized ONWA dealer nearest you. You can locate a dealer by clicking here or You can send us your order via our inquiry box on the Contact Us page.
Q: I lost a copy of my equipment's user manual, where can I possibly get another copy?
A: Search for the Unit Model in our website and download the user manual for free. Downloads include user manual, brochure, firmware updates and map updates.
Q: Why is it that my ONWA unit does not power up? It is connected to the power supply but the unit does not turn on?
A: First, you need to check the physical connection. Be sure to connect the positive wire on the positive side of the battery, likewise, the negative wire on the negative side of the battery. If connection is secured, then check the fuse on the wire or on the back of your unit for discontinuity. If this does not solve the problem, please call for technical assistance on your nearest ONWA Dealer or ONWA National Distributor. You can locate a dealer by clicking here or You can send us your order via our inquiry box on the Contact Us page.
Q: Why is my ship constantly changing its heading position on my chart plotter?
A: ONWA GPS Chart Plotter uses GPS Satellite data to predict heading information. The Chart Plotter predicts the heading information by using the vessel's speed and a trail of computed positions from the GPS satellite. Without these, the chart plotter could not predict the heading data. Thus, making the heading line go on circles when it is in a rest position.
Q: Why is it that I cannot operate the Echo Sounder mode during split screen display of my ONWA GPS Chart Plotter Combo?
A: When Echo Sounder screen is greater than or equal to 50% of the screen, all key functionality is the same as in the Echo Sounder screen only. When the Plotter screen is greater than 50% of the screen, all key functionality is the same as in the Plotter screen only. Adjust the split ratio of your device to operate the Echo Sounder mode of your device. To adjust the split ratio, there are two ways:
  • When Sounder screen is greater than or equal to 50%, press [MENU] key. Choose Split ratio and then press [ENT] key. The split ratio window will be displayed and you can now adjust the split ratio between the Plotter and Echo Sounder screen.
  • Press and hold the [MENU] key to change the Plotter and Echo Sounder screen split ratio.
Q: What is Automatic Identification System (AIS)?
A: Automatic Identification System (AIS) is a reporting system used in the identification of marine vessels and its location. Vessels equipped with this system allow each other to communicate automatically, dynamically and regularly update their position, speed, course and information such as vessel identity. The AIS radar function does not refer to its own AIS system and its features such as the VHF T/R and Letter Machine but by serial interface through (NMEA) which will be received by the AIS and sent to the radar on a real time displayed on the radar screen. ONWA Marine Electronics offer Chart Plotters with built-in AIS devices or external AIS devices which can be interfaced with your Radar and GPS Chart Plotters.
Q: How do I adjust the size of the split screen in the GPS Chart Plotter Combo?
A: Split screen is a feature of ONWA GPS Chart Plotter Combo where you can display both GPS Plotter and Echo Sounder screen at the same time. There are two ways to adjust the split ratio of the split screen mode:
  • When Sounder screen is greater than or equal to 50%, press [MENU] key. Choose Split ratio and then press [ENT] key. The split ratio window will be displayed and you can now adjust the split ratio between the Plotter and Echo Sounder screen.
  • Press and hold the [MENU] key to change the Plotter and Echo Sounder screen split ratio.
Note: When Echo Sounder screen is greater than or equal to 50% of the screen, all key functionality are the same as in the Echo Sounder screen only. When the Plotter screen is greater than 50% of the screen, all key functionality are the same as in the Plotter screen only.
Q: What is TVG? What does it do?
A: The Time Variable Gain (TVG) compensates for propagation loss of sound, so that the echoes from the same size fish schools are displayed in the same color. Normally, set it between 0 and 5. Avoid excessive TVG; weak echoes may not be displayed. The TVG is also useful for reducing surface noise. TVG is intended to compensate for the fact that close-in returns provide a louder echo than further-away ones by using a lower gain level in the period immediately after the sounder stops transmitting its ping (echoes from nearby objects) and then ramping up the gain level over time as the ping travels into deeper water, attenuating as it goes.
Q: How do I save waypoints in my ONWA GPS Chart Plotter?
A: You can store waypoints on your ONWA GPS Navigator or ONWA GPS Chart Plotter in 3 ways:
  • You can move the cursor to a location/coordinate that you want to be saved as waypoint and then press the [ENT] key. A pop-up window will be displayed and you can change the details of this new waypoint (e.g. name, mark drawing, mark color, etc.). Once all is in order, press SAVE, to save the waypoint, or QUIT, to discard the waypoint.
  • One of the features on our GPS plotters is the one-touch waypoint entry. You can do this by simply pressing the [ENT] key momentarily when there is no cursor seen. A pop-up window will be displayed and you can change the details of this new waypoint (e.g. name, mark drawing, mark color, etc.). Once all is in order, press SAVE, to save the waypoint, or QUIT, to discard the waypoint.
  • You can also enter waypoints in the Waypoint list. This can be done by pressing the [MENU] key twice. Choose Edit-->Waypoint and then press the [ENT] key. A window will appear that contains the list of waypoints that you have saved. Choose NEW then press [ENT] key. A pop-up window will be displayed and you can change the details of this new waypoint (e.g. name, mark drawing, mark color, etc.). Once all is in order, press SAVE, to save the waypoint, or QUIT, to discard the waypoint.
Q: Can I interface other brands with ONWA prodcuts?
A: ONWA Marine Electronics equipment uses the NMEA 0183 standard for all its devices. Therefore, any other brand that uses NMEA 0813 standard can be interfaced with your ONWA product. Port connectors are included, when you purchase the equipment, for interfacing.
Q: How will I know if my KP-1299, or any other KP-XX99 Plotter series, is updated or not?
A: After turning your GPS Plotter "ON", a window will be displayed containing a warning message about C-Map and K-Chart Electronic Charting Systems. On the bottom-left side of the window, the Software version of the unit will be displayed and on the bottom-right side of the window, the K-Chart version of the unit will be displayed.
Q: What is the difference between an Automatic Identification System (AIS) transponder and an Automatic Identification System (AIS) receiver?
A: There are two classes of Automatic Identification System (AIS) devices: Class “A” Transponder and Class “B” Receiver. Class “A” transponders are those with built-in VHF transmitter and receiver. This means that the device can transmit and receive vessel information to and from its own vessel. On the other hand, Class “B” receivers are only able to receive vessel information from other vessels which has AIS transmitters.
Q: What is the range Automatic Identification System (AIS) covers?
A: Normally, vessels with an Automatic Identification System (AIS) receiver connected to an external antenna placed on 15 meters above sea level, will receive AIS information within a range of 15-20 nautical miles. Even behind remote mountains, range can be determined depending on the elevation, antenna type, obstacles around antenna and weather conditions.
Q: Can I use the Automatic Identification System (AIS) of ONWA with other brands?
A: Yes. ONWA Marine Electronic equipment uses NMEA standards which makes it compatible with other brands. You can use the included cable (KS2-data1) on the package to connect the Automatic Identification System (AIS) device to other navigational equipment such as plotter, radar etc.Please connect the DB9 connector of the KS2-data1 cable to the DB9 socket of KS200A/B. Connect the other end of the KS2-data1 cable to the external navigational equipment. Wiring Connection is available in the manual.
Q: Why is it that I cannot see the ship nearby in the Automatic Identification System (AIS) screen, though I see it on the sea?
A: There are two classes of Automatic Identification System (AIS) devices: Class “A” Transponder and Class “B” Receiver. Class “A” transponders are those with built-in VHF transmitter and receiver. This means that the device can transmit and receive vessel information to and from its own vessel. On the other hand, Class “B” receivers are only able to receive vessel information from other vessels which has AIS transmitters. Thus, vessels with Class “B” AIS devices cannot be seen by other vessels, it can only receive information from other AIS devices.Another scenario would be if the other vessel has no AIS device at all. Then, only the radar can detect its presence on navigational equipment.
Q: Can I see my ship in marinetraffic.com using the Automatic Identification System (AIS) of ONWA?
A: Yes. There are only a few reasons if you cannot see your vessel in marinetraffic.com:
  • The vessel is not equipped with an Automatic Identification System (AIS) transponder or the transponder is not operational or the transponder is not properly working
  • The vessel sails in an area where no nearby AIS receiving station exists
  • The transmission power of the vessel's AIS transponder is not enough in order for a land-based station to receive the signals. This depends on the type of the transponder, the type and the height of the antenna and the quality of the cabling
  • Especially for vessels equipped with a Class-B AIS transponder, the transmission power of AIS signals is much lower than the power of a Class-A transponder and therefore the reception range in much more restricted
  • The AIS transponder of the vessel is not configured to transmit the correct information (e.g. MMSI number, ship's name etc.)
Q: I lost the adapter of my Radar for Automatic Identification System (AIS), how can I get a new one?
A: Please contact your nearest ONWA Dealer or you can send us an email about your concern on Automatic Identification System (AIS) via our Contact Us page.
Q: What are the main advantages of having a Radar In my ship?
A: Radar or Radio Detection and Ranging is a device which displays real time target object’s bearing and range relative to your own position. Once the time and bearing are measured, these targets are displayed on your radar display. This will give you a bird’s eye view of where other targets are relative to you, even when you cannot see them with your eyes due to low visibility. With radar acting as your eyes, you have the ability to see objects (targets) such as landmasses, weather systems and other vessels to assist you in the navigation of your vessel.
Q: Is the size of my ship a factor when selecting Radar?
A: No, but Radars are available in various sizes and configurations. You can choose depending on the range you want your radar to pick up.
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