Ideas:

1. This type of glyph - very important for understanding rongorongo - probably represents rangi, a word that can be translated as e.g. sky. However, it may also be used for such elevated places as a palace or for such elevated persons as a prince (at least on Tahiti according to Henry). 

2. Possibly it's meaning is sky here, as Mars moves far and wide over the sky as if travelling by double-canoe. But I believe we could as well think 'prince'. Remember my ideas about Tuesday earlier: the colour red, the canoe and the Stranger King. These phenomena are interrelated, as we can understand after having read the explanations of Te Rangi Hiroa about the absence of canoes on Mangareva.

3. Last night I got a new idea about what this type of glyph is illustrating. I have had several ideas before, but none have remained for long in my mind - they have all disappeared because the did no feel right. But now I have hope. I believe I have found the solution to the problem and I even dare to state my new idea as a suggestion.