Endurance light cruisers get a +1 to their dice roll when defending against a boarding action, because the mid-ship corridor is easy to defend and restricts access to vital parts of the ship.
Options
May increase the prow armour to 6+ for no additional cost. However, if this option is taken, the turning radius of these vessels is reduced to 45 degrees.
If the prow armour is increased, the ship may also take a power ram for +5 points, if it is part of an Imperial Navy, Adeptus Mechanicus, Inquisition, or Rogue Trader fleet list. This does not count as a separate refit. Ships so equipped impart one automatic hit during a successful ram on a target vessel before rolling for hits inflicted.