Scallop Dredges

scallop dredge
Scallop

Scallop dredging is similar to clam dredging in that large metal rakes are dragged across the bottom. However, that is where the resemblance ends. Since scallops live on the surface, unlike buried clams, they can be harvested with much lighter-weight gear. A scallop rake is typically much smaller than a clam rake, consisting of a triangular frame with a chain-link catch-bag. No hydraulics are necessary. Such gear does not require as much towing power as for clamming. Since scallops are cleaned at sea as they are caught, and all the heavy shells discarded, there is also much less on-board storage requirement. Scallop boats can therefore be smaller than clam boats, and some are quite small indeed. In fact, the entire business model seems to be different, and it appears that a few small privately-owned operations persist to this day, in contrast to clamming, which is now dominated by a few corporate fleets.

scallop dredging
A typical scallop dredging operation
scallop dredge
A scallop rake stuck in a wreck

In search of their prey, scallopers seem to be more inclined than clammers to drag close to wrecks and other known bottom obstructions. While a huge clam dredge will often tear right through an old shipwreck, a small scallop rake is much more likely to get stuck and lost, and there are a number of them around on various wrecks.

scallop boat
The Christian & Alexa is one of the few big local scallop boats.

Port and starboard rakes are stowed vertically amidships and deployed at once over each side. That is why the side of the vessel is all scarred and rusted, while the stern is enclosed. Since scallops are shucked at sea, she does not require the same heavy port facilities as the clammers, and docks at a different location.

Note the scallop rake stuck on this shipwreck at lower-right, and the many scallop pits all around. USS Murphy, NOAA

Type:
artificial reef, scallop dredge
Built:
1977, Halter Marine, Lockport LA USA, as Southern Prince
Specs:
( 156 x 39 ft ) 269 gross tons
Sunk:
Wednesday, June 29, 2022 - Delaware #11 Artificial Reef
GPS:
38°40.494' -74°43.868'
Depth:
85 ft

The Texas Star was built in 1977 on a multi-purpose supply ship hull, probably to service offshore oil platforms. The vessel was refitted as a floating casino in 1986, originally named Millionaire’s Casino, out of Savannah Georgia, but later moved to Texas and renamed Texas Star Casino. "The 12,000 square-foot vessel featured games such as craps, blackjack, roulette, poker and slot machines, with a bingo parlor situated on the nearby dock."


Shipwreck Lady Mary
Type:
shipwreck, scallop dredge, USA
Built:
1969, Pascagoula MS USA
Specs:
( 71 x 21 ft ) 125 gross tons, 7 crew
Sunk:
Tuesday March 24, 2009
foundered in storm - 1 survivor
GPS:
40°25.641' -73°51.135' (USCG 2004)
Depth:
210 ft

Shipwreck Lady Gertrude
Type:
shipwreck, scallop dredge, USA
Built:
1979, St Augustine FL USA, as Corinne W
Specs:
( 72 x 26 ft ) 119 gross tons, 3 crew
Sunk:
Monday Aug 15, 2016
broken propeller shaft - no casualties
Depth:
135 ft

steam-powered winch
A steam-powered winch on a schooner barge. Note the various drums for drawing up anchor chain, towing hawsers, etc, and the anchor chains themselves going down through the deck into the chain locker below.

Prior to steam power, the only force available on a sailing ship to perform all the necessary work was the men on board. For some tasks, such as raising the anchor, it might be necessary to yoke the entire crew to a multi-deck manual capstan. On the largest vessels, even with every available man, this might take several hours to complete. With the advent of steam power, a "donkey engine" and a single engineer could do the work of many men, in less time, and these were soon installed in almost all vessels.

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