Blockade

Unit attachment will allow sea units to blockade territories. (squid daddy) (may need to set sea zone to have exactly 0 production for this to work, haven't tested yet) <attatchment name="territoryAttatchment" attatchTo="27 Sea Zone" javaClass="games.strategy.triplea.attatchments.TerritoryAttachment" type="territory">

   <option name="blockadeZone" value="true"/>

</attatchment>

<attatchment name="unitAttatchment" attatchTo="cruiser" javaClass="games.strategy.triplea.attatchments.UnitAttachment" type="unitType">

   <option name="movement" value="2"/>
   <option name="attack" value="3"/>
   <option name="defense" value="3"/>
   <option name="isSea" value="true"/>
   <option name="blockade" value="1"/>

</attatchment>