Ship-Found Fighter is a Trait possessed by characters with the Battlefleet Home World from the Origin Path. The relevant text:
Ship-Bound Fighter: Living and training on a spacecraft is vastly different than living and training on the ground. Because of the close-in nature of ships, Battleï¬‚eet characters are unaccustomed to ï¬ghting in open spaces or on the “dirtside” of planets. While they are on a planet they suffer a –2 penalty to Initiative Tests and double the Ballistic Skill penalty for ï¬ring weapons at Long Range or greater. These penalties don’t apply to the character if they are inside a tunnel or other conï¬ned space. Into the Storm, page 12.
Marskman is the Talent that removes the penalties for firing at Long and Extreme Range. The relevant text:
Prerequisites: Ballistic Skill 35
The Explorer’s steady hand and eagle eye allows him to keep crosshairs steady on any target, regardless of range. Distance is no protection against his fire. The Explorer suffers no penalties for Ballistic Skill Tests at long or extended range. Rogue Trader Core Rulebook, page 102.
so, does this mean that a character with both Ship-Bound Fighter and Marksman would suffer no penalties from range since no penalties = 0 and double that is still 0?