The spar was to sink a harpoon into the side of the
ship the Hunley was then to release a mine and back
away, the rope then pulling the mine against the
ship,
It will be interesting to see what they find.
Have they found the wreck of the Housitonic yet?
Could probably learn a lot from it.
They spotted the submarine and attempted to attack it, but to no avail. At least we think to no avail. What if a cannonball had been shot at it?