01_7 X 20 ICE BUOY REFERENCE.pdf

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All Season Steel Buoys
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6923G523Q0320
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This document contains a federal contract opportunity notice and related technical specifications. The Great Lakes St. Lawrence Seaway Development Corporation intends to purchase 72 all-season steel buoys to be used as navigational aids on the St. Lawrence Seaway. The buoys are to be lighted, radar reflective, and designed to survive ice entrapment with special lighting and battery equipment. They will be painted red or green according to specified color standards. Interested vendors must provide all necessary materials, equipment, labor, transportation, and other services to fabricate and deliver the buoys, which must conform to United States Coast Guard specifications and drawings for steel ocean buoys. Questions are due by January 10, 2023 and quotes by January 30, 2023. This is a 100% small business set-aside administered by the Department of Transportation Saint Lawrence Seaway Development Corporation.

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2'-7"

19'-11"

3'-7"

2'-6"

7'-0" OD

6'-3"

5'-0"

7X20LI. The 7X20LI is designed and constructed for use as a seasonal aid in semi-exposed locations subject to ice conditions. It is designed with special lighting and battery equipment to survive entrapment under the ice. Note that the buoy has no radar reflector and has a very small visual profile.

a. Standard Buoy Arrangements. 1962 Type 7X20LI.

Physical Characteristics. (no mooring) Buoy Weight 6,500 lbs.

Buoy Draft 10 ft. 7. in.

Focal Height of Light 9 ft. 10 in.

Freeboard 3 ft. 1 in.

Minimum Freeboard 2 ft. 6 in.

Pounds-Per-Inch Immersion 170+

Related Equipment.

Optic Protection Polycarbonate Dome

Mooring Bridle 1 1/4 in. x 15 ft.

Mooring Riser 1/2 in.

Mooring Chain (From permanent aid)

20'-2" Sinker (From permanent aid)

Operational Characteristics. (nominal) Daymark Visual Range 1.4 nm Radar Range 0.5 nm Mooring Depth (min.) 25 ft.

Maximum Mooring Depth.

Chain Size Max Mooring Depth

1-1/2" 33' 1-1/4" 47' 1-1/8" 60'

1" 75'

Reference Documents. (use latest rev.)

G-SEC Drawing No. 120976 G-SEC Specification No. 464

File details come from the government source that posted it. Updated .