Good morning!
What do the red lines on the map indicate? You find them at Gibralter, Suez Canal, Panama Canal, and G2-G10 (Denmark to Norway).
Do they restrict movement? It makes sense the Suez is only open to the person that holds Egypt, but what about the rest?
On page 5 of the rulebook...
Narrow Sea Passages restrict sea movement for Enemy Naval Commands and Troop Transports (the restriction is not optional). Air
Units are unaffected. These passages are red (with white dots) sea region border lines and canals (Suez and Panama Canals). Friendly
Nations may pass freely. You or an ally must:
● Control (or be aligned with) Central America (the territory) to pass through the Panama Canal (A-12, P-7).
● Control Egypt to pass through the Suez Canal (M-3, M-5).
● Control both Denmark and Norway to pass through the Danish Straits (A-5, A-6).
● Control Gibraltar to pass through the Strait of Gibraltar (A-15, M-1).
● Control Malaya to pass through the Strait of Malacca (I-9, P-15).
● Control Turkey to pass through the Turkish Straits (M-3, M-4). Note: Turkey is Neutral, so neither Alliance
may pass through initially.