[THEBERBSTER]

A Warm Welcome To The Subsim Community > PawelKPL
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SH3 – 4 - 5 Tutorials > Downloads > Other Useful Information > See Links in My Signature Below

The 3 circles "Torpedo solutions line round numbers (1,2,3,) enabled" is a setting which can be found in both the TAI and Nav Map tabs in TDW's Options File Editor Viewer application.
Post #6 TDW's Option File Editor Viewer Installing It Correctly > Pictorial
These and other settings from these 2 tabs can be turned on and off while in game play so you do not need to see them when not necessary.
The "Torpedo solution line" is another patch which is useful in planning an attack but you do not want to see it when your boat is moving.

The 3 circles of course are not necessary when planning an attack.
You might find this useful.
Post #146 Auto TDC Targeting Without Using 3 Circles > Pictorial

Highly recommended, removes the broken parts of the stock game into an enjoyable ctd free gaming experience.
Everything you need is included in the download.
The Wolves Of Steel Mega Mod (TWoS) By vdr1981 > Highly Recommended For All SH5 Players

An essential application for SH5 is TDW's Generic File Patcher without this your game will not be playable.
Post #2 Installing TDW's Generic File Patcher Part 1 > Pictorial > Includes Download Link