/** @brief Calculates MIP range.
 *  @param[in] int $impulsion Techno impulsion (RI)
 *  @return int Range in system
 */
function ogame_missile_range($impulsion = 1);

/** @brief Calculates MIP speed.
 *  @param[in] int $nb_system Number of sub-system from current planet
 *  @param[in] int $speed_uni Universe speed
 *  @return int Speed in seconds
 */
function ogame_missile_speed($nb_system, $speed_uni = 1);