Another question for a store tournament the other day.

One other confusing situation that happened was that the arc line of my opponent's ship front/side lined up perfectly on the arc line of my ship's front/side. No ability to discern with the naked eye and with our marking tools (Laser and range tool).
He had line of sight from both front and side arc onto my ships front arc and side arc.

We couldn't determine if that meant the opponents ship had double arc or not. I was of the opinion that it did not, since my opinion was you need attackers zone arc line actually crossing over into the same arc of my ship.
Opponent was of the opinion that it did grant double arc. When we asked other players, the response was shoulder shrugs.
Ultimately we agreed to a coin toss which he lost, it ended up not mattering much because his ship rolled a perfect roll and wrecked my ship with one shot anyway. We still agreed to post here to ask what others thought.

To be fair, during the initial measuring I did bump my ship slightly, but I feel like I moved it back to where it was. Opponent hadn't measured before hand, yet declared he had double arc, so I had to check arc which caused the bump.
Learning experience on both sides, player doing the attacking should place the tool and verify with the defender, not the other way around.

This also begs the question as well, do arc lines widths matter? Many arc lines have different widths as well, would a smaller arc width line irk past a larger arc width line?
Thats pretty impossible to determine without computer assistance.

Arc lines are inclusive.

Essentially, if you are trying to fire into the front arc, and your arc line exactly hits the Arc Border between Front and Side, you have drawn line of arc to the front arc , as the arc line itself is inclusive .

There does involve a very, very specific situation where you can draw an arc line from your arc line, have it just barely touch the arc line of the enemy, and still keep the enemy LOS targeting dot in Arc... If you do that, then you do have the enemy double-arced (an easy shot to one, and the borderline case to the other). You are not considered crossing a different hull zone, as the arc line is inclusive of your target hull zone (and in that instance, is effectively exclusive of crossing, as you have only hit the target hull zone - it is in fact an exclusive event, as both cannot happen at the same time - and the inclusive is designed to take precedence)

From the Rulebook:

• A firing arc includes the width of the firing arc lines that border it.

A hull zone is a section of a ship token delineated by the two firing arc lines that border it.

Very detailed answer Dras! Thank you, just to ensure I'm understanding in simple terms.
When you say inclusive, you mean that both arcs (front and side) can indeed attack the same hull zone (Either side or front)?

1 minute ago, Karneck said:

Very detailed answer Dras! Thank you, just to ensure I'm understanding in simple terms.
When you say inclusive, you mean that both arcs (front and side) can indeed attack the same hull zone (Either side or front)?

So long as you are still able to draw a line from Yellow Dot to Yellow Dot AND have that line remain in ARC .

Its one of the tests of line of sight. That has to be in Arc as well.

In this case, yes he had LoS from both arcs.

Thank you again!

So, essentially, the its an 'Overlap' of Arcs by an amount equal to the thinkness of the Arc Line?

Just now, RebelDave said:

So, essentially, the its an 'Overlap' of Arcs by an amount equal to the thinkness of the Arc Line?

You can think of it like that, yes.