Cy: 4: Patches of semitransparent altocumulus (often in the shape of almonds or fishe: at one or more levels; 5: cloud elements continuously changing in aspect. Semitransparent altocumulus in bands or altocumulus in one more or less contim ous layer progressively invading the sky, generally thickening as a whole; the layer may be Opaque or double with a second sheet. 6: Altocumulus formed by the spreading out of cumulus. 7: any one of the following cases: (a) Altocumulus in two or more layers usually opaque in places and not progressively invading the sky; progressively invading the sky; (b) Opaque layer of altocumulus no: (c) Altocumulus coexisting with altostratus or nimbostratus or both. 9: Altocumulus, generally at several layers in a chaotic sky; dense cirrus is usually present. Gus i: ' Cirrus in the form of filaments, strands or hooks, not progressively invading the sky (often called "mares tails"). 2: Dense cirrus in patches or entangled sheaves usually not increasing and possib: the remains of the upper parts of cumulonimbus; or cirrus with sproutings in the form of towers or battlements or having the aspect of cumuliform tufts. 3: Cirrus, often in the form of an anvil; either the remains of the upper parts . cumulonimbus, or parts of distant cumulonimbus, the cumuliform portions of which cannot be = 8: Cirrostratus not progressively invading the sky, and not completely covering it 9: Cirrocumulus alone, or cirrocumulus accompanied by cirrus or cirrostratus or b¢ but cirrocumulus is the predominant cirriform cloud. DD for waves is given to 10°, with the unit O omitted from the entries. 80°. Thus 08 represe Directions are correct to plus or minus 10°. Period of waves is given in seconds and is correct within one second. Height of waves is given in feet and is correct within 50% (plus or minus).