====Aggression Timer=====
The presence of the aggression timer means that you have done something to piss somebody in the EVE universe off. Mouseover the aggression timer notice to see who. If it is an NPC corporation (like Serpentis), then it doesn't mean anything. Unless the corporation in question is CONCORD, in which case you're pretty well fucked. However, if you have been stealing from another player's ore cans or wrecks then that person (and their entire corporation if they are a member of a player corp) gets a 15 minute window to beat your ass like a cheap dusty rug without CONCORD interfering with them. Be cautious before taking loot from any container that does not "belong' to you.

====Incursus vs Tristan====
So you are starting out and want to know which frigate you should upgrade to after your Velator/Atron? Well, first of all, get the idea "best" out of your head. There is no "best" in EVE. What there is in EVE is your preference and what works for your pl