text: Team Operations
  Severe Damage--Military action has destroyed or burned more than one-third of the
  superstructure or deck area, rendered major subsystems (weapon sensors, radar) inoperable,
  destroyed the ship's ability to move or maneuver, or any combination of these.
  Destruction--Military action has flooded more than one-third of the ship's waterline length. This
  indicates that the ship is experiencing uncontrolled flooding, and is sinking. In addition, the
  ship's major subsystem that supports operations is destroyed.
  FUNCTIONAL DAMAGE
  4-202. When assessing functional damage, the team considers the ship's ability or inability to move and
  maneuver and the degree of disruption to particular ship subsystems such as its weapon-delivery
  capability, the functioning of its sensors, and so on.
  STEEL TOWERS
  4-203. Steel towers transmit electric power and support communications antennas, for example.
  PHYSICAL DAMAGE
  No Damage--Military action has caused no apparent damage.
  Damage--Military action has damaged supports, but tower remains standing.
  Destruction--Military action has caused tower to collapse or topple.
  FUNCTIONAL DAMAGE
  4-204. The level of functional damage associated with a physically damaged steel tower depends on
  the tower's function and on its connectivity with other target elements.
  TRANSFORMERS
  4-205. A transformer is a static electrical device that uses mutual electromagnetic induction to convert
  AC power from one current on one circuit to a different current on another circuit. The team must report
  the extent of external damage, if any, and the expected effects.
  PHYSICAL DAMAGE
  4-206. When reporting physical damage, include the total number of transformers, and the number
  damaged or destroyed.
  No Damage--Military action has caused no apparent damage.
  Damage--Military action has left the structure of the unit intact, but blackened as a result of a fire
  or of leakage of oil.
  Destruction--Military action has torn the structure apart or greatly distorted it. This is considered
  catastrophic damage (K kill).
  FUNCTIONAL DAMAGE
  4-207. The effect of transformer damage on the target's function depends on the facility's power
  requirements and on the enemy's ability to reroute the power.
  TUNNEL ENTRANCES OR PORTALS
  4-208. Tunnels at best are dangerous places for people, but some are used only for storage. Tunnels are
  used for passage, operations, storage, or some combination of these. When reporting damage to tunnel
  entrances, the team should also include, when possible, the estimated volume and size of the debris or
  rubble pile that blocks the entrance. This can help in estimating clearing and recuperation times.