... In north Asia the common mode of reckoning is in half-year, which are not to be regarded as such but form each one separately the highest unit of time: our informants term them 'winter year' and 'summer year'. Among the Tunguses the former comprises 6½ months, the latter 5, but the year is said to have 13 months; in Kamchatka each contains six months, the winter year beginning in November, the summer year in May; the Gilyaks on the other hand give five months to summer and seven to winter. The Yeneseisk Ostiaks reckon and name only the seven winter months, and not the summer months.

This mode of reckoning seems to be a peculiarity of the far north: the Icelanders reckoned in misseri, half-years, not in whole years, and the rune-staves divide the year into a summer and a winter half, beginning on April 14 and October 14 respectively. But in Germany too, when it was desired to denote the whole year, the combined phrase 'winter and summer' was employed, or else equivalent concrete expressions such as 'in bareness and in leaf', 'in straw and in grass' ...

Far south there should also be a pair of separate 'years'. There too summer and winter are obviously different entities.

The Sea in the sky would be like the deep lethal sea (moana) in contrast to tai (the coastal waters of plenty):

Moana

Salt water, deep sea, ocean. P Pau.: moana-tekereke, blue. Mgv.: moana, the sea, ocean. Mq.: moana, ocean, high sea. Ta.: moana, sea, ocean, abysmal depth or height, heaven. Churchill.

Tai

1. Ocean, sea (often used without an article); he-turu au ki tai hopu, I am going down to the sea to bathe. 2. To be calm, good for fishing: he tai. There exists a surprisingly developed terminology for distinguishing the phases of the tides: tai pâpaku, low tide; ku-gúgú-á te tai, tide at his lowest, literally 'the sea has dried up'; he-ranu te tai, when the water starts rising again; this is a strange expression, since ranu means 'amniotic liquid,' the breaking of the waters which precedes birth; in this phase of the tides the fish start coming out of their hiding places and swim to the coast in search of food; tai hahati, rising tide; tai hini hahati, tide as it continues rising; tai u'a, tai u'a parera, when the tide has reached its high; tai hini u'a, tide all throughout its full phase; tai hori, tide as it starts receding; tai ma'u, tide during its decreasing phase, right until it becomes tai pâpaku again; tai raurau a riki, the slight swell, or effervescence of the sea at a change of the moon. 3. Good spot for raising chickens; the stone chicken coops called hare moa, were built in places 'tai moa'. Ahé te tai o taau moa? whereabouts are the raising grounds of your chickens? 4. Song in general; song executed by a group of singers; ku-garo-ana i a au te kupu o te tai, I have forgotten the words of the song. Taitai, tasteless; said especially of sweet potatoes and other produces of the soil which do not taste good for being too watery; kumara taitai, watery, tasteless sweet potato. Vanaga.

1. Salt water; taitai, brackish, salty. P Mgv., Mq., Ta.: tai, salt water. Mq.: taitai, to salt. Ta.: taitai, salty. 2. Sea, ocean; tai hati, breakers; tai hohonu, depths of the sea; tai kaukau, tide; tai negonego, tide; tai o, ripple; tai parera, tide; tai poko, breakers; tai titi, tide; tai ua, tide, ebb; tai vanaga, ripple. P Mgv., Mq., Ta.: tai, sea, ocean. 3. Ta.: tai-ao, dawn. Mq.: takitaki te ao, just before dawn. Churchill.

Perhaps there is no description of 'Sea' in the G text. The Sea in the sky is 3 / 12 of the solar zodiac, leaving 9 / 12 to Land and with 472 glyph positions we maybe should search for twice ¾ of a 'year:

2 * ¾ * 314 = 472

¾ * 472 = 354 (= 12 * 29½)

¼ * 472 = 118 (= 4 * 29½)

South of the equator everything is seen upside down and there are sailable waters both above and below the doldrums. The equatorial belt is like the surface of a mirror:

"The Pacific doldrums were notably described in Samuel Taylor Coleridge's Rhyme of the Ancient Mariner:

All in a hot and copper sky,

The bloody Sun, at noon,

'Right up above the mast did stand,

No bigger than the Moon.
Day after day, day after day,

We stuck, no breath no motion;

As idle as a painted ship

Upon a painted ocean.

The colloquial expression was used in Norman Juster's children's book Phantom Tollbooth, in which a place called 'The Doldrums' is inhabited by the Lethargarians who follow the same list of activities every day." (Wikipedia)

(Illustration by Gustave Doré, 1878.)

In other words, between the pair of sailable waters (which I suggest correspond to a pair of 'Lands' in the Sky) there is a 'sea of death' (corresponding to a stretch of 'Sea' in the Sky).

"lethal ... deadly, mortal. XVII. - L., lethālis, f. lēthum, var. of lētum death, by assoc. with Gr. léthē oblivion, used as a proper name in L. (whence Lethe) for a river in Hades, the water of which, when drunk, produced oblivion of the past ..." (The Oxford Dictionary of English Etymology)

Clearly our 'Ship' is in need also of 'painted side boards' - external 'planks' in form of e.g. dictionaries explaining the origin of words. These will protect us from the billows of the sea.