What is this Offset in the CDU?

[Biga42]

How it works?

[Frederf]

It measures direction and distance between two points. Or it can create a new point an input direction and distance from a given point.

 

Take Instant Action, Easy mission and active pause (LShift-Pause) soon after starting. Look at OFFSET page by FUNC-4 (UFC) or the OSET button (CDU). In my example I am looking as CDU page on MPCD but you can use CDU screen as well.

 

As seen when first on page

[font=Fixedsys]OFFSET    F1    1       D5/B1

±0                                  L/L↕

[]INIT POSIT       MH/DIS:[]
                            354/0.0
[]N41°58.913                ?10◎

[]E043°49.623                   0[]
       [█                      ][/font]

±0 is start point. 0[] is end point. 354/0.0 is direction/distance of from "start" to "end".

We change "start" to 5 and "end" to 3.

[font=Fixedsys]OFFSET    F1    1       D5/B1

±5                                  L/L↕

[]TANKS              MH/DIS:[]
                           278/14.7
[]N42°10.753                ?10◎

[]E043°43.727                   3[]
       [█                      ][/font]

From 5 TANKS it is direction/distance 278° 14.7nm to 3.

Maybe we want to know measurement from 5 to N42°12.345, E048°55.543 instead.

[font=Fixedsys]OFFSET    F1    1       D5/B1

±5                                  L/L↕

[/font][font=Fixedsys][font=Fixedsys][font=Fixedsys][font=Fixedsys][font=Fixedsys][]TANKS              MH/DIS:[]
[/font][/font][/font][/font]                             073/222
[]N42°12.345                ?10◎

[]E048°55.543             ****[]
       [█                      ][/font]

It is 73° 222nm from 5 to these coordinates. **** means these coordinates are not any waypoint in memory.

 

Lastly you can type in MH/DIS value to create a new point "end" which is MH/DIS from "start". Maybe we wish to find new point 090° 123nm from 5 TANKS.

[font=Fixedsys]OFFSET    F1    1       D5/B1

±5                                  L/L↕

[/font][font=Fixedsys][font=Fixedsys][font=Fixedsys][font=Fixedsys][font=Fixedsys][]TANKS              MH/DIS:[]
[/font][/font][/font][/font]                             090/123
[]N41°34.953                ?10◎

[]E046°39.244             ****[]
       [█                      ][/font]

If ?10◎ is pressed then a new waypoint 10 is created at this "end" point.

[font=Fixedsys]OFFSET    F1    1       D5/B1

±5                                  L/L↕

[/font][font=Fixedsys][font=Fixedsys][font=Fixedsys][font=Fixedsys][font=Fixedsys][]TANKS              MH/DIS:[]
[/font][/font][/font][/font]                             090/123
[]N41°34.953                ?11◎

[]E046°39.244                  10[]
       [█                      ][/font]

Edited November 9, 2018 by Frederf

[Yurgon]

As seen when first on page [...]

 

Wow, brilliant explanation! I just learned several new things about this CDU page. Thanks a lot! :thumbup:

[kaltokri]

Hi Frederf,

 

 

how did you create the ANSI-Art CDU Code Snipplets?

Manually or with a tool?

 

 

Thank you for the information. I will try and practice it today.

[Frederf]

Manually. Nice thing about code tag is fixed(ish) width font. I didn't get the exact number of characters right I'm sure.

[ZeroReady]

OK I can make an offset waypoint from bullseye. If I want to the edit the DOT to that waypoint, do just set the knob back to steer point, select the waypoint I just made, and edit it from there like normal?

[Frederf]

DTOS is a waypoint or waypoint-as-flight-plan-point attribute. You'd either edit the waypoint DTOS or the flight plan entry DTOS if your waypoint isn't/is part of your flight plan the same as you would for any other waypoint not created by offset. Once the waypoint created it's the same as any other.