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stalintc · 05-09-06, 07:37 PM

Hi there

I am trying to piece together a few things in my head to help myself with learning accurate TMA.

One of the things that is bothering me somewhat is:

I have located a contact and identified it (Amethyste) DEMON shows that it is moving at 4kts.

I am moving at 7 knots.

I have determined its course and have now changed course so that I am moving on an opposite course moving parrallel to it.

Does this mean now that in my TMA I must plot the speed as 11 knots (OS speed + Target speed = bearing line separation I think) or do I still keep the targets speed in TMA as 4kts?

I have determined that if I plot 4kts into TMA it is about 8nm away and if I plot 11kts it is about 12nm away if thats any help.

I would be most grateful for any help as this is annoying me somewhat and I need to decide which of these two theorys of mine are correct :hmm:

Cheers in advance

05-09-06, 07:37 PM	#1
stalintc Seaman Join Date: May 2006 Posts: 36 Downloads: 42 Uploads: 4	TMA speed problem Hi there I am trying to piece together a few things in my head to help myself with learning accurate TMA. One of the things that is bothering me somewhat is: I have located a contact and identified it (Amethyste) DEMON shows that it is moving at 4kts. I am moving at 7 knots. I have determined its course and have now changed course so that I am moving on an opposite course moving parrallel to it. Does this mean now that in my TMA I must plot the speed as 11 knots (OS speed + Target speed = bearing line separation I think) or do I still keep the targets speed in TMA as 4kts? I have determined that if I plot 4kts into TMA it is about 8nm away and if I plot 11kts it is about 12nm away if thats any help. I would be most grateful for any help as this is annoying me somewhat and I need to decide which of these two theorys of mine are correct :hmm: Cheers in advance