KeystormNew York


Dive site characteristics

Types Shipwreck dive Deep dive Drift dive
Conditions Visibility very restricted or null
Providers Parking Boat ramp Restaurant Swimming Picnic tables W.C. Bathroom
Planning Rescue in case of emergency Weather conditionsFerries scheduleRoad conditionsRoad maps

Diving notes

From the quay, the boat has to go South (S-SE) in American waters ~1.5km away, past Grenadier Island. There are 2 buoys (black or red) which mark the location of the shipwreck. The 1st one allows diver to reach the bow within depth of 20’. The 2nd allows the diver to reach the central mast at 60’ deep.

At this location the boat may be attach to the buoy. Take note the american laws applies, the dive flag is mandatory

The shipwreck offers a great deals of possibilities to different certification level of divers. A dive between 20 to 115’ deep is possible. This is a site I appreciated. Some has indicated an important deep water current.

For more details see the diagram of Gregory Jarrett

Entry points


Note: Note: indications are accurate as possible, it is recommended to dive with someone you knows the site.

  Depth   Site  Characteristics
To display on Google map, click on the link
?90′Rockport wallOff the town of Rockport near the restaurant’s dock (ask permission). Popular site for advanced diving.
?65′Sophia (?)Off the government dock, across the bay on the West wall of the harbor.
1100′King Horn Follow the line. The visibility may changes during season as well as current. There are sometime strong winds which may make the entry difficult and even force you to cancel the dive.
2Informations to come.
325′Clara WhiteOff the north side of Bloomfield Island, South end of Grenadier Island. Two-masted schooner.
418′SE Grenadier Island wrecks Wooden wreck marked on the Canadian Hydrographic Service chart #1418.
536-75′American Watch your air, the passage of large boats and the current.
630-100′Keystorm The descent may be done on one of the two line. The visibility may vary as well as the current.

Driving directions

From highway 401, watch et take exit 675 leading to
Thousand Islands Parkway - Promenade des Milles Îles. Follow the road for about 2 km. Follow the indications for Mallorytown Landing and then turn on your left when arrived. Park your vehicule in the parking of Park Canada (there is a fee). The shipwreck is located within 15 minutes from the boat ramp.

For the other dive sites, you must continue until Rockport (see the map). Park your vehicule alongside of the road or in the parking lot.


Do you know...

If you dive on an american wreck located on US territory coming from Canada by boat, you must first pass by the US customs located on Heart Island. Also, if you dive on wrecks located on Canadian territory coming from USA, you must pass by the Canadian Customs located at Rockport. On your return way, you must pass by the customs of the departure country. For more details consult the rules.

If you park your vehicule in the St.Lawrence National Park of Mallorytown Landing, you will have to fill a use permit form of Park Canada (fill all the necessary blanks including date, usually mark the amount for a parking which appears on the panel and make the total). Insert the amount in the envelope (cash only) et put it in the box, put the stub on your dash clearly visible (otherwise you could be fined).

Diver’s services

Providers Address Phone Services
Rockport Dive Centre Ltd  31 Front Street, Rockport, Ontario 613 659-3471 air, rentals, charter, sales, repairs

© Copyright 1999-2016, Michel Robitaille. All rights reserved.