Arch Coastline is not actually a lake; the southern part of the map is open water, but is not navigable. This is the smallest of the maps at about 7km across the long axis, with only a few thousand meters between the attackers and defenders at the start of the battle. In many ways, this map is ideal for a less-organized group; you’re certain to be near the action no matter which position you start from.
That said, the defender position 3 allows them to shield behind the land, forcing attackers to engage at closer range on an approach from the center or eastern flank. On the west, the fortress guns cover about half the waters before the port; they’re avoidable, but restrict attacker maneuverability.
This is the map most likely to lead to formal ‘battle lines’, as there’s little distance to cover in formation, so that even an undisciplined group can form up a line on approach. It also features very few places to hide, making it a fast, action-oriented map.
By default, the wind blows from due east. If the attackers gain the wind advantage contention benefit, the wind shifts to blow from south-southwest.
Attacker's Wind: South Default defender door: Rectangle. Default attacker door: Closed handle. (Assuming this is the central one.) Secondary attacker door: Axe. Final attacker door: Open Handle.