ManualOperator

Sounder Depth Profile

Note: GPS Trail is drawn when "Depth Profile Outline" layer is displayed.

Event Entry

Manual Event can be entered directly from the Depth Profile Windows and when Display Mode is toggled on MaxSea.

When located an interesting echo place on the DP Windows you can add an event which allows you to situated it on the chart windows.

To add an Event Mark on a precise point you have to Right click on it in the DP Windows and select Event enter item.

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Event mark has the icon and the color presently selected in the Tool Palette same as the [Enter] key Manual event.

Related topic: Manual event

Event Mark information will inform you about received data at the event time (Position, Speed, Heading, Depth ...)

Related topic: Mark properties

Historic Mode

Historic Depth Profile Window Quick View

The Historic Depth Profile mode allows you to display a previously saved old track in the Depth Profile window, independently of your boat movement .The profile window is always associated to a track (either a previously saved old track this , or the current track).

Display the Historic Depth Profile of Selected Track on the Chart:

1.Use the Right-click menu on a track drawn on the chart and choose "Open Historic Depth Profile" and the Depth Profile window is automatically opened.

2.Select an old track with the Select tool (finger symbol on the toolbar) and choose Chart desktop mode with a profile window.

For more information see also related topic: Modifying marks

Historic Depth Profile Window consists in two parts:

1.The Depth Profile toolbar is where you can modify the scale the distance between two points on a map as they relate to the distance between those same points on the earth. of the window profile using the Magnifying tool , in exactly the same manner as used for the chart.

2.The Historic Depth profile graph is shown in green color and the arrow shows the selected point where it is located simultaneously on the chart and along the graphic of the depth profile.

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Sounder Depth Profile

Fig.1 : Depth Profile Outline of an old track selected and shown in the MaxSea Depth Profile Window

1.The track is displayed in the profile window moving from left to right and the green arrow shows you the started point of the selected track, simultaneously on the chart and in the in Depth Profile graphical view.

2.The white point moving along the track shows you each cursor movement.

3.The green graph in the Depth profile window shows you each point of the selected track that contains depth information

Learn more on related topics :

1.The point of view of the current track in the Depth profile Window corresponds to the Depth Profile with MaxSea Mode Selected

2.The Historic Depth Profile Toolbar

Historic Depth Profile Toolbar

Depth Profile's Historic toolbar contains buttons which allows you to follow the profile bottom of recorded track and whose depth information is contained in every point of track.

Use the corresponding button from the Historic toolbar to :

1.Choose Depth Profile display mode.

2.Zoom in/out depth profile displayed in the window , exactly in the same way as you do for changing chart scale.

3.Increase or decrease the vertical scale point of view: Exaggeration (+) and (-)

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4.Adjust the point of view centered on. This function is only available in historic mode.

NavNet Layers

NavNet Echo Sounder Overview

The NavNet Echo Sounder determines the distance between its transducer and underwater objects such as fish, lake bottom or seabed and displays the results on screen. It does this by utilizing the fact that an ultrasonic wave transmitted through water travels at a nearly constant speed of 4800 feet (1500 meters) per second. When a sound wave strikes an underwater object such as fish or sea bottom, part of the sound wave is reflected back toward the source (transducer). Thus by calculating the time difference between the transmission of a sound wave and the reception of the reflected sound wave, the depth to the object can be determined. The NavNet Echogram overlay in the MaxSea depth Profile improves the overview of the depth profile.

A series of snapshots are accumulated side by side across the screen, and the resulting are :

1.Contours of the bottom are displayed

2.Fish between the bottom and surface are displayed.

3.Wreck can also be displayed

4.Depth Evaluation and track down the dangerous zone areas for the navigation.

5.Overview on water temperature data changes

To learn more go to related topic :Depth Profile With MaxSea and NavNet Modes

You will learn in this section :

Setting up the Echo Sounder Display in the depth Profile window like

•Gain level, Range or noise limiter

•Switching between Manual or Automatic (cruising, fishing...) modes

•Related topics: Sounder Toolbar and Option : Sounder...

Choosing the transmission frequency between two modes:

•HF echo signal or the LF echo signal

•Related topic: Transmission frequency Overview of the Depth Profile

•Show / Hide the Depth profile outline

•Show / Hide the Forward Looking Depth Profile

•Show /Hide the A-Scope

•Show / Hide the Echogram

•Show / Hide the Temperature Graph of Sea Surface

Locate simultaneously the cursor along the Depth Profile graph and the track drawn on the chart. ( see also Related Topic: Locate your cursor.)

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Sounder Depth Profile

Enter an event to plot fish schools (See also Related Topic: Event Entry.)

NavNet Echo Sounder Overview

The NavNet Echo Sounder determines the distance between its transducer and underwater objects such as fish, lake bottom or seabed and displays the results on screen. It does this by utilizing the fact that an ultrasonic wave transmitted through water travels at a nearly constant speed of 4800 feet (1500 meters) per second. When a sound wave strikes an underwater object such as fish or sea bottom, part of the sound wave is reflected back toward the source (transducer). Thus by calculating the time difference between the transmission of a sound wave and the reception of the reflected sound wave, the depth to the object can be determined. The NavNet Echogram overlay in the MaxSea depth Profile improves the overview of the depth profile.

A series of snapshots are accumulated side by side across the screen, and the resulting are :

1.Contours of the bottom are displayed

2.Fish between the bottom and surface are displayed.

3.Wreck can also be displayed

4.Depth Evaluation and track down the dangerous zone areas for the navigation.

5.Overview on water temperature data changes

To learn more go to related topic :Depth Profile With MaxSea and NavNet Modes

You will learn in this section :

Setting up the Echo Sounder Display in the depth Profile window like

•Gain level, Range or noise limiter

•Switching between Manual or Automatic (cruising, fishing...) modes

•Related topics: Sounder Toolbar and Option : Sounder...

Choosing the transmission frequency between two modes:

•HF echo signal or the LF echo signal

•Related topic: Transmission frequency Overview of the Depth Profile

•Show / Hide the Depth profile outline

•Show / Hide the Forward Looking Depth Profile

•Show /Hide the A-Scope

•Show / Hide the Echogram

•Show / Hide the Temperature Graph of Sea Surface

Locate simultaneously the cursor along the Depth Profile graph and the track drawn on the chart. ( see also Related Topic: Locate your cursor.)

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Enter an event to plot fish schools (See also Related Topic: Event Entry.)

Echogram

The NavNet Echogram overlay in the Depth Profile Windows can be done only if a NavNet System is connected. "NO SWEEP" message appears in the top-left corner of Depth Profile window when no sweep received for 10 seconds

A limit case is that if using 3000m range, an echo may take 4 seconds to delay in its propagation.

Note that horizontal blue lines delimit Echo Sounder Range.

You may choose a display mode for the echogram between three : Manual / Cruising and Fishing modes.

The manual mode allows you to adjust the echogram gain level, Range and its view position. For more information see: Sounder Palette

MaxSea Mode chosen:

1.You can either show or hide the Echogram picture overlay in the Depth profile window. Click the Depth Profile Information arrow on chart toolbar, then choose and click the Echogram option.

2.The Echogram is always displayed in single Frequence either LF or HF depending on your choice.

NavNet Mode chosen:

1.The Echogram is always displayed in the Depth Profile when NavNet Mode is chosen.

2.The Echogram in MaxSea matches exactly the Echogram in NavNet and you can choose to display the Depth Profile window either in single or dual frequency mode.

•Echoes displayed are depending on the last 1024 sweeps.

•Shift/Range/Distance are managed for each sweep.

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•Colors: one fixed configuration and you can toggle between Day and Night screen display.

A-scope

Independently of the chosen mode you can add A-Scope display in the "Depth Profile" Windows.

Show/Hide A-Scope

Displayed by default you can show or hide the A-scope by selecting the corresponding item from the DP button pop-up menu

A-scope display

The A-scope display, available in all modes, shows echoes with amplitudes and tone proportional to their intensities, on the right of the Depth Profile Windows with fixed width. It is useful for estimating fish species and bottom composition.

It shows echoes :

-at every half a second in distance advance mode.

-updated on echo arrival on time advance mode.

-using same colors as echo.

A-scope is displayed on right in each Depth Profile window and you will get information on:

1. A-scope zone area display

2. Strong echo (bottom)

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3. Weak echo (fish)

4. No response

At any moment you can:

1.Switch between Frequence Modes: LF and HF.

2.Switch between Manual, Cruising and Fishing as you wish.

When Manual Mode is chosen you can modify the Range display view and either shift up or down the view in the Depth Profile window.

Temperature Graph

According to NMEA Sea Surface Temperature received a Sea surface [Temperature Graph] can be overlay in the Depth Profile Windows. (appropriate equipment required).

Independently of chosen mode (MaxSea Or NavNet) you can show or hide temperature graphic overlay in the Depth profile window.

To Show/Hide Temperature Graph

Displayed by default you can show or hide the Temperature Graph by selecting Temperature Graph option in the Depth Profile drop-down list .

Temperature Graph displayed with MaxSea mode chosen

In this example we only choose to display the Temperature graph.

Temperature graph is displayed in the Depth Profile window as a red graphic overlay in fixed width.

Temperature range is displayed in the left Y axis of the Depth Profile window. Its scale is based on Minimum and Maximum received temperature. The Unit is selected on °Celsius.

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Sounder Depth Profile

Temperature Graph displayed with NavNet mode chosen

Transmission Frequency

The transmission frequency of acoustic energy through the water determines how deep it will travel and also the level of definition you can expect to see after it has bounced off of an object below. The lower frequencies, (50 kHz) provide better ground discrimination. The higher frequencies, (200 kHz) will provide better discrimination between schools of fish and individual large fish.

(2) LF (low frequency)

The sounder uses ultrasonic pulses to detect bottom conditions.

The lower the frequency of the pulse, the wider the detection area.

Therefore, the low frequency is useful for general detection and judging bottom condition.

(1) HF (high frequency)

The higher the frequency of the ultrasonic pulse the better the resolution.

Therefore, the high frequency is ideal for detailed observation of fish school.

Sounding area and transmission frequency.

MaxSea Mode Chosen:

The Echogram is always displayed in Single Frequency either LF or HF depending on your choice. You can quickly and easily toggle on HF or LF by clicking the appropriate button (either HF or LF) on the Sounder toolbar . For more information see related topic: Sounder Palette.

In following picture the echogram is displayed :

1.In part number (1) with frequence mode chosen on HF

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2.In part number (2) with frequence mode chosen on LF

NavNet Mode Chosen:

The Echogram can be displayed either in Single Frequency or Dual Frequency depending on your choice.

Click the Depth Profile drop-down menu for choosing a frequency display mode.

Single Freq Mode

Following picture shows the depth profile when Single Freq is chosen. The Single frequency display shows either the HF (number 1 on picture) echogram or LF (number 2 on picture) echogram. To select transmission frequency mode, click the appropriate button (either HF or LF) on the Sounder toolbar.

Dual Freq Mode

Following picture shows the depth profile when Dual Freq is chosen. The Dual Frequency display provides both LF (number 2 on picture) and HF (number 1 on picture). This display is useful for comparing the same picture with two different sounding frequencies.

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