The channel markers are one boat length away.
That is the detail people kept coming back to.
Deep water, marked and buoyed, right there, and the hull is on brown rock in four feet of surge with waves breaking against its side.
On a calm morning a swimmer could cross it in a minute.
The gap between a safe entrance and a hard one is not a distance, which surprises people who do not run boats.
Why a harbor mouth is the worst water on the coast
Out at sea a big swell is a long hill of water moving under you.
Close in, it stops behaving like that.
The bottom shoals, the base of the wave slows while the top keeps its speed, and the whole thing stands up over the shelf either side of the cut.
A channel dredged through that shelf makes it worse. Waves refracting around the deeper slot bend inward from both sides and meet in the entrance.
Now add steering. A boat running an entrance is slowest and least maneuverable exactly when it needs steerage most, and a wave on the quarter pushes the stern around.
Once the hull turns broadside it is no longer a boat going somewhere. It is a wide object carried sideways, and the next wave puts it on the shelf.
What is actually growing on that shelf
Everybody pictures a coral garden. The shelf outside this entrance is not one.
The state biologist who surveyed it after the boat came off put live coral cover across the area at under one percent, and called the damage mostly live rock with a couple of colonies that lost fragments.
Live rock is not dead rock. It is old reef skeleton with a working skin of coralline algae and sponge, the surface a coral larva must land on before there can be coral at all.
Losing it matters, on a slower clock than a snapped colony, and it is much harder to photograph.
The ten days, and what they were spent on
The tour boat went on early one Saturday in August, with a high surf advisory in force and waves running ten to fourteen feet.
Two certified crew aboard, no passengers, nobody hurt.
The first recovery attempt failed in a way worth knowing. A tug took a line and pulled, and the deck cleats tore out of the boat.
After that, fuel first. More than 2,000 gallons of diesel and 36 gallons of hydraulic oil came off before anybody pulled again.
It came off on a high tide ten days later, under tow, and went to a yard to be hauled out.
Then the survey started, which is why the assessment and the stranding are two clocks that keep getting merged into one.
The four marks, and the numbers nobody published
The line that traveled furthest came from the biologist. It looks, he said, as though the boat skipped across the reef four times.
That is a pattern, not a count of four measured scars, and no report with four scars in it exists.
Nor does anything else people quote. No square footage was published. No coral species was named. No colony count was released, and a full year on no penalty has been reported, going by the state release and everything after it.
The mechanism exists. State rules count each damaged colony as a separate specimen, with anything larger than about a square yard counting as several, and past cases were valued at a thousand dollars per colony.
Where hard figures exist they belong to other incidents, including an anchor strike on this same reef a year earlier that cut two scars eighty feet long and cost about $25,000 to repair, as local coverage set out. Those get borrowed the way the breath holding of sea nomads gets borrowed for a tourist with a snorkel.
The fuel handling was the part that went by the book, and taking it off before touching the hull is the same instinct as the crews who boomed a creek after a tanker rolled, which is the cheapest move in any response.
What eighteen groundings a year adds up to
This was not a rare event.
Roughly 216 vessels over 26 feet grounded in state waters in a recent eleven year stretch, about eighteen a year.
Hawaiian reef building corals grow under an inch a year. That is what makes the arithmetic uncomfortable, because a hull crossing a shelf in ninety seconds removes growth that took decades.
The state is good at the repair end. Reattachment after that anchor strike left better than ninety percent of the moved colonies alive a year on.
The operator here paid for its own salvage, which is not the norm. Public money covered nearly four million dollars of removals over six years, and an audit found almost none of it comes back.
So the story is not really the four marks. It is that a coastline this busy loses a piece of shelf every three weeks, and only the ones with a boat on them get counted.
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