NOTE

When the Gain Mode option is set to Auto, the receivers Gain cannot be changed.

When the Gain Mode option is set to Manual, the Gain can be manually adjusted. When switching from Automatic to Manual Mode, the Gain + Offset value is copied into the Manual Gain setting of the receiver.

17.10.1STC (Sensitivity Time Control)

The purpose of this selection is to filter surface noise in the water.

The STC functions reduces or eliminates Surface Clutter signals by changing the Sensitivity of the receiver, decreasing it near the surface and gradually increasing it as the depth increases. Its default value is SHORT for the 200kHz frequency and MID for the 50KHz frequency. Such values are good in most conditions. However when navigating in very shallow waters it may be necessary to switch it to OFF, while in very deep waters with a lot of Surface Clutter it may be better to increase it to MID or LONG.

NOTE

In some situations it may be necessary to adjust the STC so the sounder can read through the surface noise and show the bottom. One indication that the STC needs to be changed is when the display intermittently changes the depth from the correct depth to a very shallow depth.

Figure 17.10.1 - STC - Surface Clutter

The STC can be changed from Short, Mid, Long and Custom.

17.10.1.0STC Length

This is the depth range which the STC operates. In custom mode it can be varied from 0Ft to 1000Ft (60Ft or 255Ft on previous software versions). In preset mode it’s value is reported in the following table (See Par. 17.10.1.2).

17.10.1.1STC Strength

It is the starting attenuation value of the STC. It acts by attenuating the Gain of the given percentage value. In custom mode it can be varied from 0% to 100%. The STC effect is maximum near the surface, to eliminate the Surface Clutter and it progressively diminishes to 0 at the selected STC depth.

CPF180i and CPF300i

 

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Standard Horizon CPF300I, CPF180I owner manual STC Length, STC Strength
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CPF180I, CPF300I specifications

The Standard Horizon CPF300i and CPF180i are two advanced marine chart plotters designed to enhance the navigation experience for both recreational and professional boaters. These units combine cutting-edge technology with user-friendly features, making them a popular choice among marine enthusiasts.

The Standard Horizon CPF300i is equipped with a bright 10.4-inch display that ensures excellent visibility even in direct sunlight. It features a high-resolution color screen that presents detailed cartographic information clearly. The unit integrates advanced GPS technology, providing precise positioning that is crucial for navigating complex waterways. Additionally, it comes with built-in Wi-Fi, enabling users to share their data and download updates easily.

One key feature of the CPF300i is its capability to support multiple chart formats, including C-MAP and Navionics. This flexibility allows users to select the cartography that best suits their needs, ensuring they have access to the most up-to-date navigational information available. The CPF300i also supports radar overlay and fish finder integration, making it an excellent tool for fishing and safe navigation in various conditions.

On the other hand, the CPF180i offers a slightly smaller 7-inch display but does not compromise on functionality. This model is perfect for smaller vessels, maintaining a compact form factor while delivering essential navigational features. The CPF180i also incorporates GPS functionality, ensuring accurate positioning and helping mariners stay on course. Its intuitive user interface allows for easy operation, making it accessible even to less experienced users.

Both models feature a built-in AIS (Automatic Identification System) that increases safety by displaying the positions of nearby vessels. The AIS integration allows users to monitor traffic in busy waterways and avoid potential collisions. Additionally, both units support NMEA 2000 connectivity, enabling integration with other onboard systems such as engine data and autopilot control.

In summary, the Standard Horizon CPF300i and CPF180i are equipped with high-resolution displays, robust GPS technology, and multiple chart support. The CPF300i, with its larger screen and advanced features, is ideal for those needing comprehensive navigation solutions, while the CPF180i caters to users looking for a compact and efficient unit. Together, they represent a significant advancement in marine navigation technology, providing boaters with the tools they need to enhance their on-water experience.
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