![]() |
SUBSIM: The Web's #1 resource for all submarine & naval simulations since 1997 |
![]() |
#76 | |
Black Magic
![]() |
![]() Quote:
|
|
![]() |
![]() |
![]() |
#77 |
Silent Hunter
![]() Join Date: Dec 2004
Location: AN9771
Posts: 4,904
Downloads: 304
Uploads: 0
|
![]()
Ganz verrückt if you ask me.
![]() Actually from the picture I conclude they approximated 1 knot to 1.8km/hour. 100(m)/100(sec)=1 m/s =2(knot)*x*1000(m)/3600(s) , so x=(1*3600)/(2*1000)=1.8 (km/nm) ("x" is a km per naut. mile factor this time) Which is 3% off from 1.852km/h, so I guess a good approximation in itself. But still, the km/nm factor is completely hidden for the user of the watch because of those scales. I mean, you don't need to calculate with it. I don't see the need for such a simple number. If the shiplength intel is good, speed is also good. And if you over-estimate speed (which is what this does) than you'll just end up hitting forward of the intended position. Purposefully miss-aiming!?! I don't get it. Unless the stopwatch maker had to draw it by hand, and make it easier on him. Cheapskate Dönitz! :p |
![]() |
![]() |
![]() |
#78 |
XO
![]() Join Date: Jul 2002
Posts: 436
Downloads: 59
Uploads: 0
|
![]()
Ah okay, so then If i understand correctly, the measurements must be taken within one minute or they are invalid. To be honest I still don't see how one can get an accurate speed this way with no regard to range or AOB but I'll take your word for it. Shoot for measurements under 60 seconds...got it...thanks.
|
![]() |
![]() |
![]() |
#79 |
Weps
![]() Join Date: Apr 2007
Posts: 351
Downloads: 35
Uploads: 0
|
![]()
AOB doesn't matter because you're measuring the time it takes for the ship to pass a stationary point in space (the crosshair), not the time it takes to make an angular change relative to to your boat. Think of it this way. When you superimpose the crosshair on your target, imagine it represents a piece of floating debris in the water next to the ship. The timer starts when the bow of the boat passes the debris and ends when the stern passes the debris. As long as you can guestimate the length of the ship properly, you can calculate a reasonably accurate speed.
If the ship is at 90 degrees AOB or at 10 AOB, the crosshair takes the same amount of time to travel from bow to stern. This is because at small AOB, even though the apparent length of the ship is smaller, it's agular velocity is proportionally smaller too. Conversely, at a perpendicular AOB, though it's apparent length is bigger, so to is its angular velocity. |
![]() |
![]() |
![]() |
#80 | |
Pacific Aces Dev Team
|
![]() Quote:
![]() In the end, a 150 metres long ship will take the same time at 5 knots or whatever speed to go past a fixed line, only it will seem to move faster if you see more of the ship. But that's perceived speed, and not real speed. Bow and stern will go past the fixed line at the same moment no matter the AOB (Which is logic if you consider that no matter where you place yourself to observe, the ship will be doing the same speed)
__________________
One day I will return to sea ... |
|
![]() |
![]() |
![]() |
#81 | |
Pacific Aces Dev Team
|
![]() Quote:
For example: A commander observed a cargo ship through the scope. The number of cranes shows the number of cargo bays, and in turn that number of cargo bays can be multiplied by around 1500-2000 GRT to determine total gross tonnage (Including machiney and such). Once the tonnage is figured out, the length of the ship can be estimated using naval construction mathematical formulas (Ships tend to keep the same proportions no matter the size). By such means did the U-Boat crews approach the length of the ships normally. And, as we know, like their American counterparts they tended to overestimate a lot, so it is not completely mad that the clock had a tendency to compensate that. Of course that's only a rough guess :hmm:
__________________
One day I will return to sea ... |
|
![]() |
![]() |
![]() |
#82 |
Pacific Aces Dev Team
|
![]()
UPDATE 22 Oct 2007:
Now also a NYGM compatible version: http://files.filefront.com/U+jagd112.../fileinfo.html Thanks to Stiebler and Teddy Bär for giving permission ![]() Important note: This is still a Beta. It works well, everything is functional and there are no crashes, but it will currently disable the precision periscope bearing indicator, and put the old one back. Joe will look into this somewhen when he comes back from his business trip, but right now this is what we have. Good hunting
__________________
One day I will return to sea ... |
![]() |
![]() |
![]() |
#83 | |
Silent Hunter
![]() Join Date: Dec 2004
Location: AN9771
Posts: 4,904
Downloads: 304
Uploads: 0
|
![]() Quote:
![]() |
|
![]() |
![]() |
![]() |
#84 |
Ace of the Deep
![]() Join Date: Jan 2007
Location: at periscope depth
Posts: 1,204
Downloads: 97
Uploads: 0
|
![]()
I have installed the Favorite to taste and 3 scopes mod from jcwolf.
Can i use also this mod?
__________________
![]() |
![]() |
![]() |
![]() |
#85 |
Eternal Patrol
![]() Join Date: Mar 2006
Location: CATALINA IS. SO . CAL USA
Posts: 10,108
Downloads: 511
Uploads: 0
|
![]()
I use GWX1.03 and it installed fine after i removed integrated orders.
Unfortunatly only the watch installed nothing else. Is there something I missed ? Btw i'm useing a VII IN 1941 |
![]() |
![]() |
![]() |
#86 |
Eternal Patrol
![]() Join Date: Mar 2006
Location: CATALINA IS. SO . CAL USA
Posts: 10,108
Downloads: 511
Uploads: 0
|
![]()
I guess i'll just stick with gwx 1.3 It really doesn't need modding
![]() |
![]() |
![]() |
![]() |
#87 | ||
Ocean Warrior
![]() Join Date: May 2007
Posts: 2,689
Downloads: 34
Uploads: 0
|
![]() Quote:
@Firewall, you sure you installed the right version, and have no other mods using the menu-file? The GWX version should work as advertised coz that's the one i use.
__________________
"Enemy submarines are to be called U-Boats. The term submarine is to be reserved for Allied under water vessels. U-Boats are those dastardly villains who sink our ships, while submarines are those gallant and noble craft which sink theirs." Winston Churchill |
||
![]() |
![]() |
![]() |
#88 |
Ocean Warrior
![]() Join Date: May 2007
Posts: 2,689
Downloads: 34
Uploads: 0
|
![]()
@java's revenge
you'll have to use the DIY kit and read some of the other posts in this thread. Others have done it succesfully
__________________
"Enemy submarines are to be called U-Boats. The term submarine is to be reserved for Allied under water vessels. U-Boats are those dastardly villains who sink our ships, while submarines are those gallant and noble craft which sink theirs." Winston Churchill |
![]() |
![]() |
![]() |
#89 | |
Ace of the Deep
![]() Join Date: May 2005
Location: Asturias, España
Posts: 1,168
Downloads: 39
Uploads: 0
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
#90 | |
Captain
![]() Join Date: Apr 2005
Location: Sweden
Posts: 529
Downloads: 267
Uploads: 0
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
|
|