Recently I came across some CBT videos of my father from the A320 family and 1 from the 777 family about how to taxi properly (he used to be a 777 first officer), and I discovered an interesting feature of the 777-300 series I think not many of you know: A black line over the wings.
The 777-200 series doesn’t have black lines over the wings
The 777-300 series features black lines over the wings
The said black lines have a very ineteresting pourpose: Help the pilot taxi the aircraft. You see, the 777-300 series is so long that Boeing installed a Camera system called GMCS (Ground Maneuver Camera System), which features 1 camera about halfway the fuselage between the main gear and the nose for nose gear view and 2 cameras on the leading edge of their respective horizontal stabilizers for main gear view (and yes, the system corrects for stab trim for correct pointing of the cameras). And that’s where the black line comes in the scene.
The said black line is painted directly over the outer edge of the main gear to help you locate it in adverse ligh conditions acording to that CBT video (although it can obviously be used whenever you wish)
Approximate position of the camera and its view (Port side)
Approximate position of the camera and its view (Startboard side)
Sorry for the quality of the pics, my trash internet wouldn’t allow me to post the full resolution pics