5. Yet, we must look earlier to find our 'cornerstones', β and ε Carinae (from where there are 100 days to 6 * 29½ = 177):

period 4
Ga3-17 (77) Ga3-18 (*142) Ga3-19
Miaplacidus (140.3), Tureis (140.8)  heuheu Al Minhar al Asad (142.6)

The nose of the Lion is located 59 (= 2 * 29½) days beyond Ga1-19 and 52 days beyond the Lord of Created Beings (Ga1-26):

Ga1-17 Ga1-18 Ga1-19 (492) Ga1-20 Ga1-21
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), Hatysa (492.5), ε Columbae, Alnilam (492.7), Heavenly Gate (493.0) Alnitak, Phakt (Phaet), (493.7)
     'Pyramid of Menkaure' 'Pyramid of Khafre' 'Pyramid of Khufu'
The Hem

The Twin Pyramids

Ga1-22 Ga1-23 Ga1-24 Ga1-25 Ga1-26 (499)
γ Leporis (494.9) Saiph (495.5),  ζ Leporis (495.6) Wezn (496.6), δ Leporis (496.7) χ¹ Orionis, Betelgeuze (497.3),  η Columbae,  η Leporis  (498.0) Praja-pāti, Menkalinan, γ Columbae, and Mahashim (498.3)

From Ga1-19 to Ga1-26 - both Moon-days - there is a week and similarly there is a week from Procyon to Naos - both are Mars-days:

Ga2-21 (52) Ga2-22 Ga2-23 Ga2-24 Ga2-25 (*120) Ga2-26
Markab (115.7), Procyon (115.9) σ Gemini (116.7) Pollux (117.2) Azmidiske (118.4)   χ Carinae (120.9)
Rogo Mauri Mutu
Ga2-27 (*122) Ga2-28 Ga2-29 (60)
ω Cancri (121.4) Naos (122.3)  Heap of Fuel (123.1)
Sand is returned to the beach from the sea.

However, from Praja-pāti to χ Carinae (a Sun-day) there are 30 days. Perhaps the designs of this pair of glyphs should be interpreted together. Maybe the viri sign at bottom in Ga1-26 develops into a variant of ua (or rather a rainbow sign):

29
Ga1-26 (499) Ga2-26 (529)

The following Rei (at ω Cancri, the first star in Cancer) marks the beginning of the 9th hour whereas Rei in Ga1-30 preceds Canopus:

Ga1-27 (*92) Ga1-28 Ga1-29 (30)
μ (91.3), χ² Orionis (91.5) ν Orionis (92.4) ξ Orionis (93.5)
Ga1-30 Ga2-1 Ga2-2 (505) Ga2-3 Ga2-4 Ga2-5 (*100)
Tejat Prior (94.4), κ Aurigae (94.6) Furud (95.9) Tejat Posterior, Mirzam (96.4), Canopus (96.6), ψ1 Aurigae (96.9)      
Ga2-6 Ga2-7 Ga2-8 Ga2-9 Ga2-10 (*105)
ν Puppis (100.2), ψ3 Aurigae (100.4), ψ2 Aurigae (100.5) ψ4 Aurigae (101.5), Mebsuta (101.7) Sirius (102.2), ψ5 Aurigae (102.4), ψ6 Aurigae (102.7) τ Puppis (103.2), ψ7 Aurigae (103.4) ψ8 Aurigae (104.2), Alhena (104.8), ψ9 Aurigae (104.9)
Ga2-11 (42)
Adara (105.8)
Ga2-12 (*107) Ga2-13 Ga2-14 (45) Ga2-15 Ga2-16 Ga2-17
 ω Gemini (106.4), Muliphein (106.8)   Wezen (108.1)    Wasat (110.8)  
Ga2-18 Ga2-19 (*114) Ga2-20
 Aludra (112.1), Gomeisa (112.6) ρ Gemini (113.1)  Castor (114.4)
Ga2-21 (52) Ga2-22 Ga2-23 Ga2-24 Ga2-25 (*120) Ga2-26
Markab (115.7), Procyon (115.9) σ Gemini (116.7) Pollux (117.2) Azmidiske (118.4)   χ Carinae (120.9)
Rogo Mauri Mutu
Ga2-27 (*122) Ga2-28 Ga2-29 (60)
ω Cancri (121.4) Naos (122.3)  Heap of Fuel (123.1)
Sand is returned to the beach from the sea.

Possibly we should regard the Rei type of glyph as a kind of determinant, telling the reader that the following glyph belongs in Argo Navis:

25
Ga1-30 (31) Ga2-1 (*96) Ga2-27 (*122) Ga2-28 (59)
Canopus (96.6) Naos (122.3)

96 (= 64 + 32) is half 192 and instead of connecting Canopus with Ga2-2 the creator of the text may have allowed himself the license to improve on reality a little. 122.3 - 96.6 = 25.7 and the closest whole number is 26.

If the Rei glyph type illustrates Argo Navis, then we can understand why it is oriented vertically - because the 'canoe' is following the Milky Way downwards. Southwest could be down and northeast up in the glyph system.