The J-type diplomatic barge was a starship used by the Alliance for diplomatic transport. Designed by the Theed Palace Space Vessel Engineering Corps, the craft succeeded the J-type 327 Nubian royal starship as primary transport for Naboo's queen and royal entourage. To remedy prior design flaws, the new vessel was fitted with improved deflector shield generators and multiple backup S-6 hyperdrive generators, ensuring hyperspace ability and crew safety while retaining the high speed and sleek aerodynamics that exemplified its predecessor. The vessel was also plated in shimmering chromium, similar to other Naboo diplomatic ships.

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