Memorex RX 1 Smart Manual de Instalação descarregar pdf (Página 27)

Keypad & Display Description | 25

NAV2 - Basic Steering Information

The NAV2 screen provides the bearing (BRG) and range (RNG) to the waypoint you are

approaching in large bold characters. Below these, you will see your actual Course Over

Ground (COG) and Speed Over Ground (SOG). The bottom portion of the screen provides

cross-track error information. Again, if you don’t see the information described here on

your screen, you will need to create a route in RTE1 first (refer to the Route section of the

manual).

In the bottom half of the window, the vertical line in the center represents your course line.

The checkered area on the left and right side of this area represents the out of bounds or

beyond the cross-track error limit area. Whenever the boat is left or right of the course

line, the corresponding checkered area changes to solid black, indicating the side of the

course line that you are on. The number next to the course line is your calculated cross-

track error. The numbers in the lower left and right hand corners indicate the cross-track

limit you set in the CFG1 menu under Navigation. You will notice that the cross-track error

limit lines are slanted, just as they were in the Panorama screen. So if the boat is off to

the right of the course, and the bow is pointing straight up, you are actually traveling away

from the course line. Keep the bow pointed toward the top of the course line, and you

should be able to maintain your course without a lot of drift. The BRG and COG values will

confirm this for you, when executed properly.

From time to time, you might drift off course and decide not to return to your original

course line. If you drift outside of your cross-track error limit, you can reset your course

line from your present position to the waypoint by pressing the EDIT key and selecting

Reset XTE softkey then ENT. This will save your autopilot from having to work hard to get

you back on course. Press the EDIT key again to get back into normal display mode.

In addition, if you decide you want to skip this waypoint, and go on to the next one,

Press the EDIT key, and select the Skip Waypoint softkey then ENT. Press the EDIT key

to exit. If you skip one waypoint manually, and the CDU starts skipping more waypoints

by itself, you probably need to change your Waypoint Pass Criteria in the CFG1 Navigate

menu. Refer to the Route section of this manual for more details about skipping

waypoints.

Just as in NAV1, you will see an RL or GC symbol in the upper right corner of the display

indicating whether you are navigating under Rhumb Line or Great Circle. This is set in

the CFG1 Navigate menu.

NAV3 - Expanded Navigation Information

The NAV3 screen has four windows. The upper left window is a smaller version of NAV2

screen. Please read the previous section for a detailed description of this window. The

two windows below this one indicate the current date, time and the ETA to the end of

your route for the time zone currently entered. The date and time format is set in the

CFG1 Time menu. The ETA and TTG (in the right hand window) are filtered over time,

so allow the filtering to settle when you first make a course or speed change. The filter

time is controlled in the RTE1 ETA Setup screen. The Time-To-Go (TTG) value on the

bottom of the right hand window expands from HH:MM:SS to HHHH:MM:SS when the

time to go is greater than 99:59:59. Also, these values are calculated by using your

Waypoint Closure Velocity (WCV), not your SOG. WCV as described in short detail in the

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Memorex RX 1 Smart Manual de Instalação Página 27

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