An Ice-area Navigation on the North Pacific Ocean

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Recently, with the increasing frequency ship-wrecks by the driftice on the North Pacific Ocean contained the Okhotsk Sea and the adjacent sea of Kurile Islands, the establishment of ice-area navigation has become a matter of urgent necessity. For purpose to preserve these wrecks, it is intended in the present study to details a practical method to passage through ice-area over this sea-region, based on the lessons brought those shipwrecks and the experimences for many years of the navigators. In chapter 2 details of the methods to foretell an existance of ice-area at outside of the field of vision, make use of the atmospheric phenomena (ice-blink, water-sky and mirrage of drift-ice, etc.), sea state, distribution of sea surface temperature and radar, etc.… The practical method of ice-area navigation breaking through the ice-strips lied between the open waters, and the requisite measures in the case of beseted into very close ice-area (for example, quotating the exploding technics of hummocked ice-floes carried out at the entrance of Abashiri harbor in 1956) are discussed in chapter 3. In chapter 4 mentions the counter-measures ought to take for ice-area navigation before the departure. Finally, it is explained that the adoption of reconnaissance flight is very efficacy to ice-area navigation. (chapter 5)
社団法人日本雪氷学会の論文