I'd specify a caption heading style, to be picked by the TOF and then a separate caption body style to provide the narrative.
ie
Figure 1: view of the wing
This image shows the wing blah blah...
Think that's roughly what Spurlash is suggesting in his edit today?
If anyone has a better suggestion, I'd be please to hear it; we have a number of docs with overly long Heading 2 titles that need to be edited down in the TOC every time we update them.