3. There is more to the story. Down at the Mediterranean coast of Egypt was the port of Canopus:

"Canopus stood in the seventh nome (Menelaites, later Canopites after it), on the western bank at the mouth of the westernmost branch of the River Nile - known as the Canopic or Heracleotic branch or -mouth. It was the principal port in Egypt for Greek trade before the foundation of Alexandria.

Its old Egyptian name was Pikuat; the Greeks called it Kanobos, or Kanopos (Greek: Κάνωπος), after a mythological commander of a Greek fleet supposedly buried there." (Wikipedia)

The commander's name Kanopos is probably a Sign, telling us there is a connection between the star Canopus (α Carinae) and the Egyptian port of Canopus. A commander is in charge of the destination, symbolized by the rudder:

Why had they chosen a location on the western bank of the westernmost branch of the 'nabla'?

... Nabla is the symbol \nabla (∇). The name comes from the Greek word for a Hebrew harp, called the Nevel, which had a similar shape. Related words also exist in Aramaic and Hebrew. The symbol was first used by William Rowan Hamilton in the form of a sideways wedge ... Another, less-common name for the symbol is atled (delta spelled backwards), because the nabla is an inverted Greek letter delta. In actual Greek usage, the symbol is called ανάδελτα, , which means upside-down delta. The source of the name may come from the Persian word 'del' ... (pronounced del and meaning 'heart') as the nabla shape is similar to the heart's shape in profile ... It is the name of an Egyptian harp, which was of that shape ...

Certainly it was a Sign. We remember how the distribution of the great triplet of pyramids on the Giza plateau was designed to be a Sign pointing at Orion in the night sky (cfr at Heka):

The direction east in the Giza system on the ground corresponds to the direction east in the sky, the direction of higher right ascension. Right in the map below corresponds to east, the direction of the rising Sun. But in our star maps we have perversed the natural order of things and located east at left, as if we down on earth were at the center of the universe.

The greatest pyramid of them all, that of Khufu, correspond to the star Alnitak which is rising later than Alnilam and Mintaka:

Ga1-7 (*72) Ga1-8 Ga1-9 (482) Ga1-10 Ga1-11 (12)
      Hassaleh (482.6) Haedus I (483.8)
June 1 (152) 2 3 4 5h (484.1)
Ga1-12 (485) Ga1-13 Ga1-14
Haedus II (484.9), ε Leporis (485.0), Cursa (485.4) λ Eridani (485.7) μ Leporis (486.6), ĸ Leporis (487.0), Rigel (487.1), Capella (487.4)
June 6 7 8
Ga1-15 (488) Ga1-16 Ga1-17 Ga1-18 Ga1-19 (492)
  λ Leporis (488.6) Bellatrix, Saif al Jabbar (489.7), Elnath (489.9) Nihal (490.7), Mintaka (491.4)   ε Columbae (491.6), Arneb (492.0), Heka (492.2)
June 9 (160) 10 11 'Pyramid of Menkaure' 13
Ga1-20 Ga1-21
Hatysa (492.5), Alnilam (492.7), Heavenly Gate (493.0) Alnitak, Phakt (Phaet), (493.7)
'Pyramid of Khafre' 'Pyramid of Khufu'
Ga1-22 Ga1-23 (*88) Ga1-24 Ga1-25 Ga1-26
γ Leporis (494.9) Saiph (495.5), ζ Leporis (495.6) Wezn (496.6), δ Leporis (496.7), Betelgeuze (497.3) η Leporis (498.0), Praja-pāti, Menkalinan, Mahashim, and γ Columbae (498.3) η Columbae (498.7), μ Orionis (499.3)
June 16 17 18 19 6h (499.3)
Ga1-27 (500) Ga1-28 Ga1-29 Ga1-30 (*95)
χ² Orionis (499.5), ν Orionis (500.4)   ξ Orionis (93.5), Tejat Prior (94.4) κ Aurigae (94.6)
June 21 (172) 22 23 24
Ga2-1 (*96) Ga2-2 (33) Ga2-3
Furud, Tejat Posterior, Mirzam, and Canopus (96.6), ψ1 Aurigae (96.9)
June 25 26 (177) 27

From Alnitak (493.7) to Canopus (504.6) there are 10.9 days.

The boat pits and the cemetaries on the easten side of the pyramids are presumably placed there as another Sign. It could indicate how spring equinox is arriving - in the sky the 'canoes' would no longer be needed, because ahead 'land' was rising from the 'water'. Life / light would soon be restored by the rays from the star Canopus.

The port Canopus ought to be slightly further ahead (to the west on the ground) than the flat of Giza.

According to Wikipedia the modern name of the port Canopus is Abu Qir, located at 30º04' E. And Giza city is at 31º13' E. Longiturde coordinates are counted from the Prime Meridian defined at the Royal Observatory in Greenwich, London.

30 * 60 + 4 = 1804 and 31 * 60 + 13 = 1873.

1873 - 1804 = 69 (which happens to be the glyph number at Aldebaran, rising heliacally in day 149 = May 29).

69 / 21600 * 365.25 = ca 1.2 days.

Presumably it means κ Aurigae at Rei and June 24 is the evening prior to Recreation.

"Kappa ... Greek: κάππα is the 10th letter of the Greek alphabet, used to represent the /k/ sound in Ancient and Modern Greek. In the system of Greek numerals it has a value of 20. It was derived from the Phoenician letter kaph.

Letters that arose from kappa include the Roman K and Cyrillic К ...

Kaph is thought to have been derived from a pictogram of a hand (in both modern Arabic and modern Hebrew, kaph means palm/grip) ..." (Wikipedia)

It supports my suggestions. The 'grasping hand' (chikin) is needed for igniting fire:

There are 13 'feathers' at left, emerging from the Sun symbol (at bottom).

Perhaps it once was necessary to drill a new fire at each of the 4 corners of the square earth (in time).