Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors
Chatham Strait

Gerhard – Residency

8th sighting in Chatham Strait
Fluke of Gerhard
Gerhard Confirmed in the catalog @26699
Jul 10 – Aug 19, 2022 · Chatham Strait

Chatham Strait · Jul – Aug 2022

75 m
Deepest dive
2:44
Longest dive
25
Dives
Sightings
3
Days between first and last sighting
40

Dive stats modelled within real depth limits — not measured

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SightingSeafloorSea tempDeepest dive (modelled)
Jul 10, 2022107 m—55 m
Jul 24, 20229 m—7 m
Aug 19, 2022253 m—75 m

Seafloor and sea temperature measured · ✳ dives modelled

Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors

Deepest dive against the seafloor, per sighting

Seafloor · measured Deepest dive · modelled
Jul 10, 2022 — seafloor 107 m (measured), deepest dive 55 m (modelled)Jul 10Jul 24, 2022 — seafloor 9 m (measured), deepest dive 7 m (modelled)Jul 24Aug 19, 2022 — seafloor 253 m (measured), deepest dive 75 m (modelled)Aug 19

Depth runs down from the surface. The modelled dive never passes the measured seafloor at that sighting.

Dives

75 m
Deepest dive
2:44
Longest dive
25
Dives
21 m
Avg dive depth
3
Sightings
40
Days first → last

Dive metrics are modelled within real depth limits — not measured

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Dive profile

modelled
05010075 mstartdive sequence (illustrative)

Depth shaped by the seafloor limit here (253 m) and the published dive-behaviour distribution. Modelled, not measured.

Deep Effort Score

Deep

Depth, duration and recovery resolved into a single number for this session.

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Place

Where this happened · Aug 19, 2022

measured
Seafloor depth
253 m
Sea-surface temperature
—
Distance from shore
4.0 km

Across the residency · 3 sightings

measured
Seafloor depth
9 m – 253 m
Sea-surface temperature
—
Distance from shore
1.0 km – 4.0 km

Sources: GEBCO seafloor grid · PacIOOS coastline distance

Activity map — real sighting points on an OpenStreetMap basemap © OpenStreetMap contributors

Source records

This activity is assembled from 3 catalogued encounters on Happywhale.

Sighting records from Happywhale, published as occurrence data via GBIF. Individual records are licensed CC0 1.0, CC BY 4.0 or CC BY-NC 4.0, depending on the contributor.

The photographs and fluke identifications behind every sighting are the work of the contributing observers — the citizen scientists, naturalists and operators who logged them, each named in the underlying GBIF occurrence record. Every activity links out to its source encounters on Happywhale. Basemaps © OpenStreetMap contributors (ODbL).

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Breach is an independent project. It is not affiliated with, nor endorsed by, Happywhale or GBIF.