As we all know pvp is sometimes very hard to come by, unless you're doing port battles or you have a deathwish there's few ways to encourage people to engage in pvp with you. So here's my suggestion: similar to what people have suggested as a 'Pirate raiding mechanic' you should be able to form a raiding party, however these parties would be capped at 6 players i.e. one group, and consist of ships totaling a maximum of 1000 BR. You then buy a raiding license from a friendly port for another enemy port and this is then listed in a separate tab on the map menu, unlike port battles it isn't globally announced, but specifically to players who have buildings in this port (and listed in the aforementioned menu). The raiding party sails to the port, engages in a battle versus a group of traders sailing across the map, the defense (assuming there is one) consists of anything up to a total of 1000 BR - up to 6 players. If successful, any ships capped by the raiders are attached as fleet to the players and needs to be returned to a friendly port. The result is that if the raid is successful, production buildings are damaged in the port, and need to be repaired to continue production, and production is halted for two hours by the port, the traders containing goods that are in demand & produced at that port are captured or defended. At the moment this is just a rough sketch of the mechanics and the details would need to be ironed out, but atm there's a (relatively small) carrot for pvp, but no stick, and limited use for frigates in terms of RvR and I believe something like this could go a fair way to solving those issues. Additionally I think the window for this should be 2 additional hours either side of the PB window.