The interpretation of underwater photographs has to this point been accomplished using the analysis described by Jeff Glickman in TIGHAR's
Research Bulletin #63 printed in 2013. The nine criteria used by Jeff in analyzing the potential of an artifact are shown in the attachment hereto.
How does this Possible Window Slide shape up? Let's apply Jeff's 9 criteria:
1. Differences in organic (natural) vs. man-made shapes. My opinion is that the parallel sides to the track, as well as the regular, alternating, pattern of the bumps, puts this artifact squarely in the man-made column.
2. Texture differences between objects within a neighborhood. The second attachment, showing the artifact, demonstrates vivid contrast with the surrounding surface and objects.
3. Pattern differences between objects within a neighborhood. Ditto. Nothing nearby looks anything like the artifact in question.
4. Color differences within multiple color spaces within a neighborhood. The maroonish color of the artifact contrasts vividly with all surrounding objects.
5. Color absorption differences (spectrometry) between specific objects. I do not have the equipment or expertise to make any determination in this case.
6. Temporal similarities vs. differences between video frames. The integrity of the artifact is not diminished either frame-to-frame or between various sets of frames (the artifact appears on multiple occasions in the 8.55 minute High Definition video from 2010: in the two attachments below, the respective time stamps are 13:41:04;12 and 13:43:48;24).
7. Object size and scale information
which may be relative, absolute and ratiometric (mensuration). The third attachment places the artifact in context: it sits to the left of the open cockpit of the Electra (see third attachment) wherein the pilot's seat cushion is clearly visible (IMHO) and the relative sizes of seat cushion and window slide are reasonably comparable.
8. Object interaction with its environment. The artifact rests on the side of the fuselage, as I interpret the photos, outside the aircraft's cockpit.
9. Location information including absolute position, relative position, and context. Absolute position is at a depth of 255 meters, down-slope from the presumed position of the "Bevington Object", as sought by the ROV operators on the Niku VI expedition. Relative position and context have been covered above.
I am convinced that this artifact is a section of the window slide from the pilot's window of the Lockheed Electra, registration NR16020, lost in July of 1937.