investigating Mission 12 & DRYAD

[LordOrion]

There is something I don't understand  in encoding example in Briefing PDF:

 

Quote

Example (for Set Letter Mike Foxtrot):

Challenging station: Set number Golf Mike Sierra Tango Hotel

Deciphered number: 2 4 6 6 2

 

Shouldn't the correct encrypted sequence ( 2 4 6 6 2 ) be "VICTOR,  FOXTROT, BRAVO, OSCAR, UNIFORM"?

The example seems to be using  the letters int the same reference row of the numbers, but this does not make any sense since it is the same for all reference rows and hence there is no "encryption' in that way...

 

While in mission, should be strictly follow the 'strange' behavior described int he documentation?

 

[baltic_dragon]

It may be an error on my part - if so I will fix it for the upcominhg 2.7 patch, along with all the problematic missions. Cheers!

[LordOrion]

On 3/23/2021 at 2:25 PM, LordOrion said:

There is something I don't understand  in encoding example in Briefing PDF:

 

 

Shouldn't the correct encrypted sequence ( 2 4 6 6 2 ) be "VICTOR,  FOXTROT, BRAVO, OSCAR, UNIFORM"?

The example seems to be using  the letters int the same reference row of the numbers, but this does not make any sense since it is the same for all reference rows and hence there is no "encryption' in that way...

 

While in mission, should be strictly follow the 'strange' behavior described int he documentation?

 

 

Looks like I've used the  wrong encryption too

The  set letter for "Mike Foxtrot" is Delta, hence,  correct sequence for ( 2 4 6 6 2 ) is:  QUEBECK, JULIET, CHARLIE,  KILO, TANGO

[LordOrion]

Ok, yesterday I've flown (and passed)  the mission but I had some trouble with DRYAD:

 

Authentication process was  ok:

 

WHISKEY,  X-RAY=> BRAVO

DELTA, TANGO => WHISKEY

 

However, in the coordinate encryption i got:

 

ROMEO,  UNIFORM  => NOVEMBER (?)

KILO, INDIA, GOLF, UNIFORM, SIERRA, WHISKEY, HOTEL => 57 70'.831

 

GOLF,  CHARLIE => WHISKEY  (?)

DELTA, ECHO, SIERRA, FOXTROT, TANGO MIKE, WHISKEY  => 29 75'.871

 

Which are  obviously  not correct...

In the end I've passed  the mission since I saw the Max flare signal, but I'm curious to understand what I did wrong...

Edited March 26, 2021 by LordOrion

[baltic_dragon]

On my „to do” list, will get to it ASAP and let you know. 

[baltic_dragon]

@LordOrion I checked the Dryad and to me it looks fine.

 

For coordinate encryption you first do Set Letter, in which, according to instructions: "The first letter designates a row in the current active page. The second one is used similarly to the authentication mode, except that the letter immediately to the right is selected". So if you look at the  table for Rome, Uniform next letter to Uniform in the row is: November. 

 

Then for the numbers you use the next row below the one where the Set Letter. So in our case for November we use the row below R. There the letters are read out and each symbolises a number. So KILO is 3, INDIA is 7, GOLF is 2 and so on... let me know if it makes sense!

[LordOrion]

17 hours ago, baltic_dragon said:

@LordOrion I checked the Dryad and to me it looks fine.

 

For coordinate encryption you first do Set Letter, in which, according to instructions: "The first letter designates a row in the current active page. The second one is used similarly to the authentication mode, except that the letter immediately to the right is selected". So if you look at the  table for Rome, Uniform next letter to Uniform in the row is: November. 

 

Then for the numbers you use the next row below the one where the Set Letter. So in our case for November we use the row below R. There the letters are read out and each symbolises a number. So KILO is 3, INDIA is 7, GOLF is 2 and so on... let me know if it makes sense!

 

@baltic_dragon

I'm probably wrong but there is still something that does not make sense to me (yep, I'm hard headed)

 

Here from wikipedia (same explanation of the PDF): https://en.wikipedia.org/wiki/DRYAD

 

Quote

Numbers are enciphered one digit at a time. A ciphertext letter is chosen from the selected row (the row designated by the SET LETTER) in the column under the plain text digit. If the digit occurs more than once in the number, the coder is instructed to choose a different letter in the same column. All the digits in a single plaintext number are encoded from the same row. (There is also a provision for encoding letters associated with map grid coordinates.)

 

If I correctly understand the explanation, that should mean, for Set Letter NOVEMBER (Still ROMEO, UNIFORM), use the N row to code:

 

0             1          2        3      4       5       6      7       8    9

RPJU - QHX -  CTN -  OW -  MA -  KBY -  EL -  IG -  SD - FY

 

So K=5, I=7, G=7 and so on.

 

 

BTW: There is a typo in the code-page in the pdf, 3rd reference row (the red ones with no green letter on the 1st colum) has a "KV" instead of a"KI".

Edited March 31, 2021 by LordOrion

[DaveDewhurst]

Im getting the following Coordinates

Spoiler

N 5770831

W 297.5871

using the cypher as I understand it

If I use the reference rows, I get

Spoiler

N 33.27682

W116.1648

Which if I swap the KI For the KV makes more sense.

as

Spoiler

N 37.27682

W116.1648

I'm going to fly it again with these and see if i can find it

 

Dave

[adirtynurse]

Still as of today. As reported above. The DRYAD red lines of set number codes have a typo. Use the bottom one, that's the one being used by Max. The other two are incorrect. And gives you the wrong coordinate. Only one digit is off and the difference is 290nm

[baltic_dragon]

I will have another close look at this issue when I get to M12 during the overhaul process!