Radar, Sonar explained

[Egan]

Originally Posted by LukeFF

Bump to my question above and a new one:

In what measurement system are the range settings on the PPI display given? Yards? Feet? Meters? (please, no!)

It should be in yards, I think, but it is difficult to be sure. I've certainly been working on the assumption that it is in yards.

Originally Posted by Egan

It should be in yards, I think, but it is difficult to be sure. I've certainly been working on the assumption that it is in yards.

The PPI shows YARDS.

To convert to Nautical Miles (nm) you need to dived the range in yards with 2025 or just 2000 to make it easy.

I have found if you stop the beam right on the contact and then line the PPI up so the buttom of the station is horizontal, you can then take a pice of paper and line it up with the peak and read the more correct range from the scale. Now click on the A-scope and line that one up. Take transparent bearing tool and read the bearing off it. With out touching anything press the keyshortcut for navigationsmap - the radar operator now says the bearing to the contact so you can check that with the one you read your self.

Now plot it.

[Hitman]

I have found if you stop the beam right on the contact and then line the PPI up so the buttom of the station is horizontal, you can then take a pice of paper and line it up with the peak and read the more correct range from the scale. Now click on the A-scope and line that one up. Take transparent bearing tool and read the bearing off it. With out touching anything press the keyshortcut for navigationsmap - the radar operator now says the bearing to the contact so you can check that with the one you read your self.

Now plot it.

Many thanks for the tip

Unfortunately it is a poor substitute for proper range circles

[rhohltjr]

Since 1.3 my SD radar has kept me from being strafed or bombed by aircraft.

I built up enough points and with a newer boat, got a SJ radar in addition to my SD.

Now I am back to having aircraft right on top of me again (like pre 1.3).
I think I know how to turn the things on, and turn continuous sweep or single sweep on. Yet I am still bounced by the aircraft now that I have the SD & SJ.
That just doesn't seem right to me .

Can one of you ole salts produce a video newbie guide to radars(SD + SJ) for training us radar retards! (does a video like this exist already?)

Thanks,

rhohltjr

[John Channing]

The problem you are having is built into the game.

The game can only use one sensor at a time. If you are using the SD radar (which is automatically on whenever you are in the boat) to look for planes then all is good. However, once you turn on the SJ Radar to look for Surface Contacts (which is the "manable" station), then the game won't see the SD Radar anymore and planes can sneak in.

It is what it is.

JCC

[rhohltjr]

Originally Posted by John Channing

The problem you are having is built into the game.

.....
It is what it is.

JCC

So in real WW2 boats the SD and the SJ could be used together? In that case it seems we have twice as many 'Sparky' crewmen in the conning tower than we need:hmm:. We only need the SD operator since you operate the SJ manually. Edit: Oops, forgot about the Sonar!

Perhaps I shall replace the extra Sparky crewmen with Torpedo guys since I need a lot of them.

Thanks anyway.

[LukeFF]

Originally Posted by John Channing

The problem you are having is built into the game.

The game can only use one sensor at a time. If you are using the SD radar (which is automatically on whenever you are in the boat) to look for planes then all is good. However, once you turn on the SJ Radar to look for Surface Contacts (which is the "manable" station), then the game won't see the SD Radar anymore and planes can sneak in.

Ehm, not quite. I've had multiple radar contacts come in from the SD radar set while the SJ was on at the same time. Easy way to tell if it's an SD radar contact is to go to the PPI display and see if you can pick up any blips on the screen. If you can't see any contacts at the long range setting or see contacts that are rapidly changing course and bearing, then it's an aircraft contact (SJ radar could pick up aircraft contacts, but not very reliably).

[rhohltjr]

Thanks LukeFF and JChanning,

My issue is that with only the v1.3 SD radar I was NEVER attacked by aircraft. Even when going 7600x in time compression, the SD pulls the time compression down to 8x which I then stop and figure what the 'bogey' is. When I click on the unknown 'bogey' it usually says 'very fast' so that is my first clue about it being an aircraft. Japanese hovercraft and hydroplanes very limited in WW2 IIRC:rotfl:.

With the SD + SJ combo I am subject to aircraft attacks again which makes the SJ totally worthless for me . It's not like I wasn't finding anything to shoot at using only sonar contacts.

regards,

rhohltjr

[John Channing]

Originally Posted by LukeFF

Ehm, not quite. I've had multiple radar contacts come in from the SD radar set while the SJ was on at the same time. Easy way to tell if it's an SD radar contact is to go to the PPI display and see if you can pick up any blips on the screen. If you can't see any contacts at the long range setting or see contacts that are rapidly changing course and bearing, then it's an aircraft contact (SJ radar could pick up aircraft contacts, but not very reliably).

Both of the mannable stations are SJ Radar, one PPI and one A scope, bit both are SD only. There is no manable station for SD. I believe that the only place that SD (air) contacts show up is on your Nav Map screen. So you showing simultaneous SD and SJ radar contacts on the Nav Map screen?

JCC