FIELD: sea and navy fleet. SUBSTANCE: azimuthal circle is made in form of transparent belt of horizons. Scales of horizons (visible, civil and navigation) are marked onto the belt. There are time scale and mark(arc) of route. Ecliptic is marked out according to dates taking coordinates of real Sun onto account. All the construction is mounted onto hinge support provided with a rod. EFFECT: widened functional capabilities; improved safety. 2 dwg
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