The Tactical Tomahawk Weapons Control System (TTWCS) is assembled by items specifically defined by Department of the Navy Naval Sea Systems Command Washington Navy Yard, DC 20376-7012 drawing number 8749400. Item number 68, part number 128QD-24 and item 69 part number 1303410 L/R from drawing 8749400 references the slides approved for use within TTWCS. Only items identified by official Department of the Navy Naval Sea Systems Command drawings (drawing 8749400) can be used within TTWCS. Part numbers 128QD-24 and 1303410 L/R are proprietary designs by Jonathan Engineered solutions and no other company produce these slides.