SUBSIM Radio Room Forums - View Single Post - Adjusting the contrast for the Stadimeter

Platapus · 03-15-08, 03:32 PM

First of all, I really like learning new tricks. And this one seems pretty handy. Unfortunately this old dog has problems learning new tricks.

In any class, there is always one that simply does not get it. That someone is me

So learn me a few things about this technique.

AoB - We are not worrying about calculating AoB as we are setting AoB to 90 and positioning the boat accordingly. Check, got that

Speed - Calculating that through radar/sonar/visual and manually entering that in the TDC. Check, got that

Range to target - Missing. This old dog is stubbing his paws on this one but we will bypass this for the moment. I trust that this technique does not require range

"We've gone to periscope depth. He's very close now, on bearing 324º. Here's the procedure. We can fire any time between bearing 345º and 15º. We'll do it pretty close to zero for best accuracy. With the target unlocked we'll sight ahead of the target by about 1/3 of its length and hit the bearing/range send button (make a note to have the TDC already set with that available ahead of time). Without touching the aiming of the periscope and with target still unlocked, we'll just send a couple of friendly fish his way as juicy parts of the target pass the crosshairs. Ready??"

Ready? nope. This is where you lost me. Talk me in for a landing here.

1. "We can fire any time between bearing 345º and 15º" Why? What tells me that I can fire anytime between these two bearings. Is is just an axiom of the technique or did I miss some calculation?

2. "We'll do it pretty close to zero for best accuracy." Why? Is this just for a minimum gyro angle or is there something more I am missin?

3. "we'll sight ahead of the target by about 1/3 of its length" Why? Why 1/3 and why are we sighting ahead of the target instead of locking on to the target and waiting for it to cross the 000 bearing? If I sight ahead of the ship won't my AoB be slightly off?

This old dog is sitting here scratching his ear with his foot a thinkin what about range to target? You mean to stand there with all your shiny braid and tell me that using this technique without changing anything it will work for a ship 600 yards away up to 1600 yards away?

Say it ain't so Joe, Say it ain't so!

03-15-08, 03:32 PM	#8
Platapus Fleet Admiral Join Date: Oct 2006 Posts: 19,369 Downloads: 63 Uploads: 0	Doin it Dicks way First of all, I really like learning new tricks. And this one seems pretty handy. Unfortunately this old dog has problems learning new tricks. In any class, there is always one that simply does not get it. That someone is me So learn me a few things about this technique. AoB - We are not worrying about calculating AoB as we are setting AoB to 90 and positioning the boat accordingly. Check, got that Speed - Calculating that through radar/sonar/visual and manually entering that in the TDC. Check, got that Range to target - Missing. This old dog is stubbing his paws on this one but we will bypass this for the moment. I trust that this technique does not require range "We've gone to periscope depth. He's very close now, on bearing 324º. Here's the procedure. We can fire any time between bearing 345º and 15º. We'll do it pretty close to zero for best accuracy. With the target unlocked we'll sight ahead of the target by about 1/3 of its length and hit the bearing/range send button (make a note to have the TDC already set with that available ahead of time). Without touching the aiming of the periscope and with target still unlocked, we'll just send a couple of friendly fish his way as juicy parts of the target pass the crosshairs. Ready??" Ready? nope. This is where you lost me. Talk me in for a landing here. 1. "We can fire any time between bearing 345º and 15º" Why? What tells me that I can fire anytime between these two bearings. Is is just an axiom of the technique or did I miss some calculation? 2. "We'll do it pretty close to zero for best accuracy." Why? Is this just for a minimum gyro angle or is there something more I am missin? 3. "we'll sight ahead of the target by about 1/3 of its length" Why? Why 1/3 and why are we sighting ahead of the target instead of locking on to the target and waiting for it to cross the 000 bearing? If I sight ahead of the ship won't my AoB be slightly off? This old dog is sitting here scratching his ear with his foot a thinkin what about range to target? You mean to stand there with all your shiny braid and tell me that using this technique without changing anything it will work for a ship 600 yards away up to 1600 yards away? Say it ain't so Joe, Say it ain't so! __________________ abusus non tollit usum - A right should NOT be withheld from people on the basis that some tend to abuse that right.