Debris from early Twentieth Century wreck on Pearl and Hermes Reef. Inside the atoll.

Port hole window from early Twentieth Century wreck on Pearl and Hermes Reef. Inside the atoll.

Debris from early Twentieth Century wreck on Pearl and Hermes Reef. Inside the atoll.

Debris from early Twentieth Century wreck on Pearl and Hermes Reef. Inside the atoll.

Debris from early Twentieth Century wreck on Pearl and Hermes Reef. Inside the atoll.

Debris from early Twentieth Century wreck on Pearl and Hermes Reef. Inside the atoll.

Pintle from early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Copper debris from early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Copper fasteners left from hull of Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Copper fasteners left from hull of Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Blubber rendering pots from early Nineteenth Century whaling vessel on Pearl and and Hermes Reef.

Copper fastener protruding from seafloor from early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Copper fasteners standing and lead ballast (yellowish tubes) from early Nineteenth Century whaling vessels on Pearl and Hermes Reef.

Pintle from an early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Gudgeon from rudder system on early Nineteenth Century whaling vessel with grinding stone to right. Pearl and Hermes Reef.

Marine archaeology in action. Diver measuring dimensions of blubber rendering pot on early Nineteenth Century ship wreck of whaling vessel on Pearl and Hermes Reef.

Measuring the distance from the blubber rendering pot to other debris of an early Nineteenth Century ship wreck of a whaling vessel on Pearl and Hermes Reef .

Brick debris from blubber rendering oven. From ship wreck of early Nineteenth Century ship wreck of a whaling vessel on Pearl and Hermes Reef.

Pintle from an early Nineteenth Century whaling vessel on Pearl and Hermes Reef. SCUBA diving marine archaeologist taking notes.

Copper fastener and copper sleeve for stanchion. Debris from ship wreck of whaling vessel on Pearl and Hermes Reef.

Copper fastener from ship wreck of a whaling vessel on Pearl and Hermes Reef.

Large anchors from the ship wreck of a whaling vessel on Pearl and Hermes Reef.

Diver shows scale of anchors seen in image reef3696. From ship wreck of a whaling vessel on Pearl and Hermes Reef.

Diver's arm shows scale of anchors seen in image reef3696. From ship wreck of a whaling vessel on Pearl and Hermes Reef.

Anchors from the ship wreck of a whaling vessel on Pearl and Hermes Reef. See image reef3697 for scale of anchors.

Copper hooks approximately 8-12 inches in length in a cavity in the coral. From ship wreck of a whaling vessel on Pearl and Hermes Reef.

One of the blubber rendering pots from the wreck of an early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Looking down into a blubber rendering pots from the wreck of an early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Copper hooks approximately 8-12 inches in length in a cavity in the coral. From ship wreck of a whaling vessel on Pearl and Hermes Reef.

Copper fasteners from ship wreck of Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Anchor with fishing line. Diver gives scale. Anchor from ship wreck of early Nineteenth Century whaling vessel.

Measuring grinding wheel that was used to sharpen harpoons and flensing knives. From ship wreck of a whaling vessel on Pearl and Hermes Reef.

Lead ballast from ship wreck of early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Measuring one of two cannons (second in bottom left of image) from ship wreck of early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Copper fitting from ship wreck of early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Large hook for lifting blubber from stripped whale to the rendering pot. From ship wreck of early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Debris from ship wreck of early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Various copper fasteners from ship wreck of early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Anchor from the ship wreck of a whaling vessel on Pearl and Hermes Reef. See image reef3697 for scale of anchor.

Anchor from the ship wreck of a whaling vessel on Pearl and Hermes Reef. See image reef3697 for scale of anchor.

Cannon ball approximately 10 cm across from ship wreck of whaling vessel on Pearl and Hermes Reef.

Cannon ball approximately 10 cm across from ship wreck of whaling vessel on Pearl and Hermes Reef.

Measuring two cannons from ship wreck of early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Huge hook for lifting blubber from whale to rendering pot. From ship wreck of early Nineteenth Century whaling vessel on Pearl and Hermes Reef.

Lead ingot from ship wreck of a whaling vessel on Pearl and Hermes Reef.

Sunken buoy on Maro Reef.

Sunken buoy on Maro Reef.

Diver inspecting sunken buoy.

Anthropogenic debris on Maro Reef.

Porthole on Maro Reef. This particular artifact did not appear to be associated with a nearby wreck.