However, after some research, it is possible these were naval target balloons, and the USS Trepang was conducting a weapons test of some kind. As indicated and referenced/sourced above, “From 22 February to 22 March [1971], the nuclear attack submarine operated beneath the northern ice cap, conducting extensive tests to provide data for her weapons systems, as well as carrying out scientific experiments concerning the movement, composition, and geological history of the cap itself.”
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