TEXT: Errata & Clarifications
  Heroes Unlimited, 2nd Ed.
  Sheesh, you'd think with three editors we'd catch all the boo-boos before Heroes
  Unlimited, Second Edition went to print, but we didn't. So here are corrects and
  clarifications.
  The Latent Psychic
  H.U. 2, page 190, gives the Latent Psionic the same base I.S.P. as the Natural or
  Master Psionic. This is a mistake (editors have been appropriately tortured). It
  should read as follows:
  The Latent Psychic's base I.S.P. is his Mental Endurance (M.E.) attribute number
  x2, plus the roll of 1D4x10. The total is the character's starting level of raw mental
  power.
  As the psychic grows in experience, so too does his I.S.P., adding 1D6+1 I.S.P. per
  each level of experience, starting with level one.
  The Natural or Master Psionic
  H.U. 2 also short changes the Master Psionic, and should read as follows:
  The Master Psychic's base I.S.P. is his Mental Endurance (M.E.) attribute number
  x2, plus the roll of 2D6x10 (not 1D6x10 as listed). The total is the character's
  starting level of raw mental power.
  Random Heroes with Psionic & Super Abilities
  Players who use the random table: The Number & Category of Super Abilities
  (H.U. 2, page 226), can roll up superbeings who have both a super ability and
  psionic powers (86-00). Such characters are considered to be Latent Psychics, and
  must spend I.S.P. to use their psionic ability(s).
  Since they also possess one or more super abilities, the character does not gain new
  psionic abilities like the normal Latent Psychic (unless the G.M. thinks it is okay,
  and allows it, but be careful not to imbalance the game). However, I.S.P. do
  increase at a rate of 1D6+1 I.S.P. per each level of experience, starting with level
  one. Base (starting) I.S.P. is the M.E. number, plus the roll of 1D6x10.
  The Achilles' Heel for Mega-Heroes
  H.U. 2, page 183, 11-20 Vulnerability to Magic should also include a penalty of -
  1D4+1 to save vs magic of all kind (spells, circles, potions, etc.).
  Super Ability: Manipulate Kinetic Energy
  H.U. 2, page 235; damage corrections.
  Large Axes (battle, chopping types) should be 3D6 (not 2D6).
  Throwing Axes should be 2D4 damage (not 1D6).
  Bola should be 2D4 damage (not 1D6).
  
  Discus, Metal should be 2D6 damage (not 1D6).
  Discus, Metal with Blade Edges should be 3D6 damage (not 2D6).
  and ... Throwing Sticks have a range of 120 ft (36.6 m)
  Super Ability: Alter Physical Structure: Fire
  H.U. 2, page 243, omissions from #7. Other Abilities & Bonuses:
  • Fiery Aura adds 50 to S.D.C. while in the fire form.
  • Maximum altitude for characters who can fly when transformed in to flame is
  2000 feet (610 m).
  Recovery of S.D.C. for Alter Physical Structure Powers
  The extra S.D.C. provided by any of the Alter Physical Structure abilities recovers
  much more quickly than normal S.D.C.; roughly 4D6 S.D.C. points per every 10
  minutes! This impressive rate of recovery applies only to those special S.D.C.
  gained from the altered state (metal, rock, ice, etc.). Ordinary physical S.D.C. and
  Hit Points recover at the normal rate for humans.
  Rifts® Coalition Navy Errata
  Missing in Action!
  Missing Skills
  In Rifts®: Coalition Navy, page 33, in the description of the CS Navy Sailor
  O.C.C., certain MOS skills were referred to but the descriptions of these skills
  were accidentally omitted. These skills are as follows:
  Naval Tactics: A basic understanding of the "military doctrine" of the navy in
  question (CS, Free Quebec, NGR, Nemo's New Navy, freebooters, etc.; each is a
  little different) and the naval military in general. It includes preferred methods of
  fighting (on both small scale engagements or full battles), seaman do's and don'ts,
  ship weapon systems, ship and naval power armorrecognition, naval combat,
  strategies and tactics, and other basic naval procedures, military methods and
  operations.
  In combat, a successful tactics roll will reveal the obvious and/or some hints as to
  the best way to approach a potential combat situation (like recognizing a potential
  attack because torpedo tubes are open, the best way to impair or scuttle a ship,
  ideal targets, evasive maneuvers, etc.). Otherwise a successful roll will determine
  an accurate recognition of a naval vessel, use or reading of naval weapon system,
  proper execution of a naval tactic or maneuver, and proper procedure. Base skill:
  30% +5% per level of experience.
  Naval History is a basic historical knowledge of the oceans and seas of Rifts Earth
  and the beings that travel on and below them. The base skill percentage indicates
  the approximate degree of information the character has learned or can remember
  
  accurately about the oceans and seas, or various aquatic creatures and beings. Base
  skill: 30% +5% per level of experience.
  Basic Cybernetics is similar to the M.D. in Cybernetics skill in the Rifts® RPG,
  page 28, but scaled down. This skill gives the character a basic knowledge of the
  function and application of various cybernetic mechanics, their structure, function
  and repair. This is best applied to external bionic and cybernetics such as a bionic
  arm, leg, eye, body armor, etc. to make "field repairs." The character can also make
  (or help make) repairs on loose, uninstalled implants. However, they are not
  Cyber-Docs and can not perform surgery to remove or install any internal
  cybernetic. Nor can they attach or detach bionic systems to the body. Repairs can
  only be made to the external machine, i.e. arm, hand, weapon, etc., not the
  attachment to the nerves or flesh and blood body. Likewise, the character cannot
  perform medical procedures of any kind, he's a basic cybernetic mechanic or
  assistant mechanic/Operator! Base skill: 25% +5% per level of experience.
  Penalties: -5% if bionic part is attached to a living being. -10% if repairs are made
  under-fire or other stressful conditions. -30% if of alien manufacture and design!
  Requires: Mechanical Engineer, Literacy and Advanced Mathematics skills.
  Field Expedient Surgery is the same as the Field Surgery skill found on page 61
  of the Coalition War Campaign book. Base skill: 16% + 4% per level of
  experience.
  GR-155 Electromagnetic Howitzer
  Rifts: Coalition Navy™, page 83, the description of the CSS Chi-Town is missing
  the stats for the GR-155 Electromagnetic Howitzer! Don't ask us how this
  happened, hear's the stats:
  This is a modern electromagnetic version of the pre-Rifts 155mm howitzer.
  Although this weapon lacks the range and sheer firepower of some larger cannon
  (like the C-406), its ease of handling and versatility make it a valuable support
  weapon of the CS navy. This cannon is mostly used to assist in landing operations
  both through shore bombardment and providing either light or cover (whichever is
  needed) for the landing troops but will also be employed against enemy vessels.
  Primary Purpose: Assault and Fire Support.
  Secondary Purpose: Anti-Ship and monster.
  Shell Type: Armor piercing shells are used for anti-ship combat and inflict 3D6x10
  M.D. to a 10 foot (3 m) blast radius.
  Plasma and Fragmentation shells are used for shore bombardment and inflict
  (respectively) 1D6x50 to a 50 foot (15.2 m) blast radius, and 2D4x10 M.D. to a 70
  foot (21.3 m) blast radius! Illumination shells will light up an area like flares and
  smoke shells will create clouds of vision-obscuring smoke over a 300 foot (91 m)
  
  radius.
  Mega-Damage: Varies with shell type as noted above.
  Rate of Fire: 4 rounds per minute, maximum.
  Effective Range: 18.7 miles (30 km)
  Payload: 210 shells total. A standard load includes 90 armor piercing, 60 plasma,
  30 fragmentation, and 15 each of illumination and smoke shells.
  Strike Penalty: -3 to strike targets or target areas smaller than a truck.
  Note: In addition to the shells listed above, chemical shells (fire retardant, tear gas,
  etc.) are sometimes employed. Newer shells (such as laser-guided and rocket-
  assisted) are in the experimental stage but are not yet available for front-line
  combat.
  About Pirates & Water Skis
  Coalition Navy™, page 113, The Pirate O.C.C.'s skill of Pilot water skis & water
  sleds is actually referring to two separate skills--both of which appear on Coalition
  Navy, page 28. These are Pilot: Water Skiing & Surfing and Pilot Water Scooters.
  Miscellaneous Typos & Errata
  Coalition War Campaign (1st printing), page 170, for the C-42 Rail Gun Cluster
  Housing, when all three guns are fired, they inflict 3D6x10 M.D., NOT 3D6x100
  M.D.
  Rifts® Underseas, page, 103, the mini-torpedo tubes for the T-23 "Bottom
  Feeder" mini-sub usually have a payload of 4-6 torpedoes per tube. They may be
  assigned more or less depending upon the nature of their current mission.
  Rifts® Psyscape™, page 138, the Zenith Moon Warper's M.A. is 1D6+2. The
  "1D6+2-" was a typo.
  Rifts® South America: One, page 81, the Kittani Raptor Power Armor/Robot's
  leap kick inflicts 6D6 M.D., not 6D6x10 M.D.
  
SOURCE: textdata/thevault/Palladium Fantasy/Palladium - Rifts - Heroes Unlimited and Rifts Errata.pdf