Read tide diagrams in ManYue: compare tidal range rather than season or one high water

Spring tide is not restricted to spring, and a higher high water alone need not prove a larger range. Read original celestial-position diagrams and level cards in ManYue, fixing the comparison quantity before linking spring/neap conditions with phase. Audit spring/neap relationships using tidal ranges and celestial positions; this supplies neither coastal plans nor live levels. All examples are paper assumptions, without automatic local tide prediction.

Separate position diagrams from level cards

A shows ideal Sun–Earth–Moon geometry; B lists high/low levels at one location and common vertical datum; C leaves real place/date blank. A explains geometry, B range arithmetic and C missing prediction data. Record legend and non-scale construction, without measuring astronomical distances from drawing gaps. Keep original numbers free of real-port labels so they are not mistaken for a travel tide table. No observations means no claim of a measured high on a particular date.

Check approximate alignment at new and full Moon

Show new Moon roughly between Sun and Earth and full Moon roughly across Earth from Sun. Both approximate alignments relate to larger average spring ranges. Full Moon is not excluded, and alignment sketches do not imply an eclipse every time. Tidal effects reinforce range here; do not claim the gravitational vectors point identically everywhere. The diagram supplies a relation, not local high-water time.

Read quarter geometry and smaller range

Quarter positions place Earth–Sun and Earth–Moon directions roughly perpendicular, associated with smaller neap ranges. Smaller does not mean still water or no highs/lows. Without orbital direction, retain two quarter-position candidates rather than force first/last labels. Changes are gradual, not instantaneous jumps between four constants. Phase provides context, while local lag and geographic response require data absent here.

Subtract low from high at a common datum

Card one has high three metres, low one, range two. Card two has high four, low two, also range two. A higher high alone does not establish greater range. Card three has high two point five and low one point five, range one. Use common vertical datum and comparable pairing; differing places or datums require resolution before direct level comparisons. These are arithmetic cards, not observations tied to a real date in A.

Keep the name separate from season and weekday

NOAA explains that the historical name spring tide is unrelated to spring; spring/neap conditions recur throughout the year. Sunday or November alone cannot determine a local spring tide. The longer cycle differs from the daily number of highs, which this position sketch does not prescribe identically for all coasts. Tide types and current speeds require their own definitions; maximum flow speed is not automatically maximum water level, and a name is not a complete tide table.

Return between legends and numerical cards

Read the original PDF through an existing local path, enlarging alignments, right angles and the three level cards and checking arrow meanings. Returning from B’s range to A establishes a model relation, not a measured new-Moon card for a real coast. Existing bookmarks or external notes suffice without a tide module. After zoom changes, use card identifiers to avoid pairing one card’s high with another’s low. Preserve each result’s input identity.

Check mixed range, level and real timing

If high three becomes range three, restore low one. If spring season becomes necessary, revisit terminology. A phase marker cannot provide the next local high-water time without local prediction data. Large drawn waves do not prove large tidal range: wind waves and tides differ. Share original cards and datum explanation, not fabricated warnings or navigation information. Unknown currents, weather effects and coastal geography remain unknown rather than become verified through “usually”.

Reopen with quantities and conditions

Reopen the same report, identify A/B and recalculate ranges two, two and one metre before explaining alignment versus right angles. Retain nonseasonal naming, level/range separation and ideal geometry versus local time. Explain why higher high need not mean greater range. With real sources, reassess place, date, datum and tide type instead of reusing invented numbers. Completion is auditable model reading, not ocean observation, universal port prediction or assessment of coastal activity conditions.

Related guides and sources

Read Moon-phase diagrams in ManYue: separate the lit hemisphere from the visible bright disk; ManYue fictional timetables: record arrival, departure and midnight dates separately.

Checked on November 15, 2026: Apple public information lists ManYue 2.0.5, requiring iOS / iPadOS 15.0 or later. See the official App Store for published capabilities; verify controls in the installed version.

Method reference: NOAA Ocean Service: spring and neap tides. Materials and numbers are original exercises. Record external reports, paper reasoning and actual reading observations separately, without inventing missing conditions. Sources do not establish new automatic analysis by the app. No step-by-step physical-device, private-server or all-output-environment testing is claimed.