hazards?lat=57.0405&lon=-135.3421&radiusMetres=250

Give it a latitude, a longitude and a radius in metres and it answers with every charted underwater rock, obstruction and wreck inside that circle, nearest first, each with its…

Give it a latitude, a longitude and a radius in metres and it answers with every charted underwater rock, obstruction and wreck inside that circle, nearest first, each with its charted depth, its water level effect, its name where the chart names it, and the geodesic distance from your position. Parameters go in the query string: this is a GET, there is no body. NOT FOR NAVIGATION, stated first because it is a condition of using the source. Derived from NOAA Electronic Navigational Charts and redistributed; not an official NOAA ENC, and it does not meet federal chart carriage regulations under 33 CFR 164 or SOLAS chapter V. Every response repeats this under `disclaimer`. NOAA and NOAA ENC are registered trademarks of NOAA, which does not endorse this service. COVERAGE is the same 65 cells as GET /v1/marine/depth: bands 3 to 5 over Sitka Sound; Kasaan Bay and Clarence Strait; Metlakatla, Ketchikan and Revillagigedo Channel; Juneau, Gastineau Channel and Lynn Canal; and Cordova with eastern Prince William Sound. Not statewide and not the whole coast. The check reads the coordinate, so it happens after payment; a position off the charts is refused with outside_coverage, which does not settle. Every response repeats the coverage under `coverage`. WHAT AN EMPTY ANSWER MEANS, because this is the one that can hurt: an empty list means the chart shows nothing there, not that the water is clear. Read the zone of confidence from GET /v1/marine/depth for the same position before you read anything into a clean result. Zones C, D and U mean the area was never fully searched and NOAA says so; in zone D large depth anomalies may be expected. Only three S-57 classes are searched -- UWTROC, OBSTRN and WRECKS -- so a charted danger that is a buoy, a cable, a fish haven area, a spoil ground or a restricted area is not in this store and will not appear. WHICH CHART ANSWERS, and why it is not just one: the largest-scale cell covering each part of the search wins, applied per location ra

UNRATEDDelisted

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.005 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x76a51b5d…21968fce

URL

https://api.geoprimitives.dev/v1/marine/hazards?lat=57.0405&lon=-135.3421&radiusMetres=250

Seen

first 34 days ago · last 14 days ago

54 free handshakes

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x402

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Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.728 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by latency p95 · gap to 1.000 is 0.272: 0.072 uncertain ? + 0.200 short ? · 0.072 to B

How the composite of 0.728 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
latency p95costs the most it answered as fast as its class	0.20	0.00	0.000		0.000	−0.200	0
liveness it answered at all	0.60	1.00	0.879		0.528	0	−0.072
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.728	gap to 1.000 = 0.272 · 0.200 short · 0.072 uncertain	0.728	−0.200	−0.072

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check

The multiplication, written out

  0.200 × 0.000   latency p95    
+ 0.600 × 0.879   liveness       
+ 0.200 × 1.000   price stability
= 0.728           → UNRATED: 51 of 30 paid calls      weights 2026.09.6 · 51 samples · seed cap_01M1A59RVB4EDKZSZ4MDSA4BVS|2026-08-27T02:54:20.335Z|2026.09.6

Verify it yourselfnpx teppi-check https://api.geoprimitives.dev/v1/marine/hazards?lat=57.0405&lon=-135.3421&radiusMetres=250curl -s https://api.teppi.xyz/v1/trust/cap_01M1A59RVB4EDKZSZ4MDSA4BVS