Players of GDW's Sky Galleons of Mars aerial combat game who feel they have mastered the game might want to consider using the following supplemental rules to cover situations not anticipated by the original game.

NEW MOVEMENT RULES

These rules are intended to add some uncertianty to the tactics of the game, and thereby simulate the often unpredictable nature of high-altitude battles.

Updrafts and Downdrafts: Winds do not only blow horizontally; there are often powerful currents of air pushing a ship up or down. This can sometimes be usefull, other times devastating. At the start of each ships movement, roll a die. If the result is 6, then that ship has encountered an updraft or a downdraft. Roll again and consult the following table:

When rolling to avoid changing altitude, Kites always add 1 to the die roll. A player may always elect not to roll; this means changing altitude without the expenditure of movement points. Note that each ship may also climb or descend to counter the effects of wind currents - unless the trim gear or engines are out of order.

High Martian flying parties and English marines aboard Throckmorton Conveyers will also be affected by updrafts and downdrafts. Because they are smaller, they are more vulnerable to the wind. Roll normally to see if flying parties encounter updrafts or downdrafts, but they are automatically affected if those winds exist. On a 1-3, the winds blow the fliers up one altitude level; on a 4-6, the winds blow the fliers down one level. Fliers blown into the ground roll one die for each individual in the party - on a 1 or 2 the individual survives. Any Throckmorton Conveyers blown into the ground are automatically damaged and cannot be used even if the passenger survives. No flying parties or conveyers may be lifted above Very High altitude.

Screw Galley Sprints: A player commanding a Martian Screw Galley may elect to have his ship's turncranks do a "sprint" during one movement phase. To perform a sprint, the player rolls a die and divides the result in half (rounding all fractions down). The resulting number is the additional number of movement points gained by the ship for this turn. The next turn, the ship may only use half its normal movement points (round down). A ship can only sprint once per scenario.

Boiler Overloads: British players can attempt a similar technique using a steam flyer's boilers. At the start of his movement, the player declares he is overloading the boiler, rolls a die and consults the following table:

NEW COMBAT RULES

Martian Pole Mines: The Pole Mine is a new device, created by Oenotrian shipbuilders desperate to overcome the superior British vessels. It is nothing more than a standard Drogue Torpedo mounted on along pole in front of the vessel. The vessel makes its attack as if intending to ram the target vessel, but the impact triggers the pole mine before the ships collide. A Pole Mine does damage to the target like a Tether Mine or Drogue Torpedo. The attacking ship suffers no damage, but after the mine detonates, the attacker must roll normally to avoid colliding with the target ship. As with other ram attacks, the target may attempt to evade a Pole Mine.

The Pole Mine is intended to be mounted on small, fast screw galleys, analogous to the torpedo boats of Earth's oceans. Only a single Pole Mine can be mounted on a vessel, and once triggered, it is gone. Weight: 1 ton; cost £25; Crew: none.

High Martian Sabotage Parties: High Martian flying parties can perform other jobs besides simply boarding enemy ships. One flying party in a given scenario can be designated by the High Martian player as a specially-trained Sabotage Party. The Sabotage Party can attack the rigging of kites, the propellers of screw galleys and steam flyers, and the rudders of any craft.

The party must be in the same hex as the target when attacking, and and the player must state what component is being attacked. He then rolls a die. On a 6 the party does one die worth of damage to that component. If the crew quality of the High Martian is Crack, then the sabotage party does damage on a 5 or a 6.

Mutiny: High Martian screw galleys use slaves as turncranks. Under certain circumstances, these slaves may to revolt and take control of the ship. Each turn, before the Movement Phase, the High Martian player rolls a die for each screw galley under his command, and adds the following modifiers to the roll:

The player then consults the following table:

Each group of 10 can inflict 1 die of casualties on the officers and gunners, following ususal combat rules. Once all High Martian on board have been defeated, the rebel-controlled ship will attempt to leave the map. The revolt can be put down by the High Martian player if half the rebelling turncranks are killed, or if the enemy in the battle is defeated. If the rebellion has been put down on a High Martian ship, then there will be no more mutinies aboard that vessel during the battle.

Note hat the High Martian player need not begin rolling until his ships have started suffering casualties. These rules could also be used to determine the behavior of captured merchant ships controlled by privateers but crewed by prisoners.

Notes: These rules can create some interesting tactical situations. For example, the Sprint rules mean that even relatively slow Martian screw galleys have a cance of closing with faster British steam ships, to board or ram. The wind rules make scenarios amid the mountains especialy tricky. Pole Mines are a way for small ships to do significant damage, and are cheap enough for any ship to mount. The High Martian rules are particularly appropriate in more role-playing-oriented scenarios, such as the Great Raid, or in a Sky Galleons campaign game (inspiring the slaves on a High Martian screw galley to revolt would look marvelous in the pages of the London Times).