LWAMI Error in the number of blades for container ship.

Blacklight · 11-17-11, 07:46 PM

I found an error in the USNI reference for the latest LWAMI. The reference says that a civilian container ship has a four bladed propeller, but when I'm looking at it in the Demon screen, it shows 6 blades.

I double checked in the database and the both versions of the Container ship have 6 blades. Is there an easy way to edit the USNI reference to change the number of blades ? I would imagine that it's a quick fix.

Molon Labe · 11-18-11, 07:23 PM

Good find.

You've actually stumbled upon a database error. The correct blade count should be 6, but for container ships that have 50 hz signatures, the database was left at 4. This is an artifact from before we installed the ACTUV models. (my fault)

The 60hz family of container ships has the correct value.

Blacklight · 11-18-11, 10:59 PM

I was on Skype trying to teach a friend how to use the narrowband and the DEMON to help figure out the identity of a contact and my friend comes back and says "Okay. This target has 6 blades." and I was like "What !?! That target should be a container ship ! What the hell is he targeting !?!" I thought he had wandered off somewhere and was way of target. Twenty minutes of arguing later. I picked up the ship and saw the six blades and thought something was definitely screwy. I did a close approach with my periscope and saw that the target was indeed the container ship.

11-17-11, 07:46 PM	#1
Blacklight Ocean Warrior Join Date: Sep 2006 Location: Connecticut Posts: 2,507 Downloads: 145 Uploads: 0	LWAMI Error in the number of blades for container ship. I found an error in the USNI reference for the latest LWAMI. The reference says that a civilian container ship has a four bladed propeller, but when I'm looking at it in the Demon screen, it shows 6 blades. I double checked in the database and the both versions of the Container ship have 6 blades. Is there an easy way to edit the USNI reference to change the number of blades ? I would imagine that it's a quick fix. __________________ Be my friend or be a mushroom cloud. "I am coming at you. You will explode in a couple of minutes !" Last edited by Blacklight; 11-18-11 at 12:18 AM.

11-18-11, 07:23 PM	#2
Molon Labe Silent Hunter Join Date: Jun 2004 Location: Along the Watchtower Posts: 3,810 Downloads: 27 Uploads: 5	Good find. You've actually stumbled upon a database error. The correct blade count should be 6, but for container ships that have 50 hz signatures, the database was left at 4. This is an artifact from before we installed the ACTUV models. (my fault) The 60hz family of container ships has the correct value. __________________

11-18-11, 10:59 PM	#3
Blacklight Ocean Warrior Join Date: Sep 2006 Location: Connecticut Posts: 2,507 Downloads: 145 Uploads: 0	I was on Skype trying to teach a friend how to use the narrowband and the DEMON to help figure out the identity of a contact and my friend comes back and says "Okay. This target has 6 blades." and I was like "What !?! That target should be a container ship ! What the hell is he targeting !?!" I thought he had wandered off somewhere and was way of target. Twenty minutes of arguing later. I picked up the ship and saw the six blades and thought something was definitely screwy. I did a close approach with my periscope and saw that the target was indeed the container ship. __________________ Be my friend or be a mushroom cloud. "I am coming at you. You will explode in a couple of minutes !"