Found a nice little section of evil sea again, after the last one succumbed to multiple unconsciousness induced deaths and lost forts.
This one has a flat little plateau, with a bit of path around the edge. Evened out the rough landmass and removed the ramps leading up, walled off the southern end of the plateau leaving a very small access point on the north end. The southern end recently saw a necro siege (end of the second spring, lasting until autumn) and I had my single marksdwarf practice a bit on the leftover zombies after I caged a necro and several other zombies to use as practice dummies. There WAS an aquifer, but I caved in a landmass to penetrate through it, leaving a 5x5 square to cut into the stone beneath.
Working on getting self-sufficient still, everyone has been living off of above ground plants and what meat we can scavenge from the random wildlife wandering around. Hopefully the next caravans bring the requested items the liaison left with almost 2 years ago, since the last one never showed up because of the siege.
Pansies. My tiny milita, clad only in bronze handled 3 goblin ambush squads easily, helped by 3 dwarves entering martial trances and leaving only 1 survivor to tell the tale. Zombies shouldn't pose much of a problem soon enough... most of the militia are already legendary in their respective weapon skills, and only require a little more experience with their armor and dodging skills.
This fort should eventually be very well defended, not only because of the limited access but the nearly unlimited resources I have at my disposal in my enclosure. Tons of trees, an aquifer, sand and clay.