Attachment_4_26-105-921-R-_Preliminary_Hydrophone_Installation.pdf

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Attached to
HAULOUT OF THE R/V STURGEON
Solicitation number
140G0226R0020
Issued by

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This is a technical drawing document for hydrophone installation on a transom, prepared by JMS (Naval Architect) for the USGS Great Lakes Science Center in Ann Arbor, Michigan, specifically for the R/V Sturgeon research vessel (101' x 24' x 10").

The drawing provides detailed specifications for mounting two new hydrphones on the vessel's transom plate, including precise measurements, mounting hardware requirements, and cable routing instructions. General notes specify that all dimensions and measurements must be confirmed prior to installation, welding and wild swung operations must comply with ABS rules for marine vessels, all workmanship and materials must conform to applicable standards, and shipboard installation must follow manufacturer guidelines. The document includes three detailed cross-sectional views (Sections 1-C and 2-C, and Detail 3-C) showing the mounting plate configuration, hydrophone well specifications, cable entry points, and hardware placement. Key specifications include 3/8" diameter countersnk fastener screws, 1/16" mounting plates at 3/8" thickness, 12" SGN PD pipe sizing, and provisions for waterproof cable penetration in hydrophonic wells. The drawing is marked as preliminary and dated 04/20/2028, drawn by AG Mott and reviewed by AMS B, with revision control indicated in the header.

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70 Essex St.

Mystic, CT 06355 voice 860.536.0009 fax 860.536.9117 jms@jmsnet.com

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REVISIONS

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REFERENCES

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REV

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DESCRIPTION

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DATE

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APPROVED

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REF

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DESCRIPTION

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DRAWING

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REV

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HYDROPHONE INSTALLATION ON TRANSOM

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FWD LKG AFT WELL CAP NOT SHOWN FOR CLARITY SCALE: 3/8" = 1'-0'"

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PRELIMINARY

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REVISION:

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SHEET:

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DRAWING NO:

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CHECKED BY:

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REVIEWED BY:

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DRAWN BY:

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SCALE:

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DATE:

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SIZE:

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R/V STURGEON

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USGS - GREAT LAKES SCIENCE CENTER

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ANN ARBOR, MI

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HYDROPHONE INSTALLATION

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AutoCAD SHX Text THIS DOCUMENT IS THE EXCLUSIVE PROPERTY OF JMS AND IS FURNISHED ON A CONFIDENTIAL BASIS. THE RECIPIENT OF THE INFORMATION CONTAINED HEREIN MAY NOT DISCLOSE OR MAKE AVAILABLE THE SAME TO ANY OTHER PERSON OR BUSINESS FIRM, NOR MAY THE SAME BE USED EXCEPT FOR THE SPECIFIC PURPOSE INTENDED. JMS SHALL NOT BE HELD RESPONSIBLE FOR ANY UNAUTHORIZED CHANGES TO THIS DOCUMENT OR ITS INTENT.

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LML

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AS NOTED

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SHEET 1 0F 1

AutoCAD SHX Text 04/30/2026

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DJF

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ANSI B

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GENERAL NOTES

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1. ALL DIMENSIONS AND MEASUREMENTS TO BE CONFIRMED PRIOR TO ALL DIMENSIONS AND MEASUREMENTS TO BE CONFIRMED PRIOR TO INSTALLATION. 2. ALL WELDING AND WELD SIZING TO BE I.A.W. ABS RULES FOR BUILDING AND ALL WELDING AND WELD SIZING TO BE I.A.W. ABS RULES FOR BUILDING AND CLASSING MARINE VESSELS 3. ALL WORKMANSHIP, MATERIALS AND COMPONENTS TO CONFORM TO ABS ALL WORKMANSHIP, MATERIALS AND COMPONENTS TO CONFORM TO ABS REQUIREMENTS. ALL STEEL TO BE ABS GRADE A. PLATE UNDER 1/2" THICK MAY BE ASTM A-36 INSPECTED ACCORDING TO ABS RULES FOR MARINE VESSEL CONSTRUCTION. 4. SHIPYARD SHALL INSTALL MARPORT HYDROPHONES IN ACCORDANCE WITH SHIPYARD SHALL INSTALL MARPORT HYDROPHONES IN ACCORDANCE WITH THE MANUFACTURER INSTALLATION GUIDELINES. 5. SHIPYARD TO INSTALL WATERTIGHT CABLE PENETRATION IN HYDROPHONE SHIPYARD TO INSTALL WATERTIGHT CABLE PENETRATION IN HYDROPHONE WELLS P/S FOR ROUTING HYDROPHONE CABLE. CABLE PENETRATION SHALL BE PRESSURE TESTED IAW ABS RULES AND TO THE SATISFACTION OF THE ATTENDING SURVEYOR AND USGS TECHNICAL REPRESENTATIVE. 6. HYDROPHONE WELL SHALL BE WATERTIGHT AND PRESSURE TESTED IAW ABS HYDROPHONE WELL SHALL BE WATERTIGHT AND PRESSURE TESTED IAW ABS RULES AND TO THE SATISFACTION OF THE ATTENDING SURVEYOR AND USGS TECHNICAL REPRESENTATIVE. 7. MARPORT HYDROPHONE MOUNTING SCREW LOCATIONS TO BE CONFIRMED MARPORT HYDROPHONE MOUNTING SCREW LOCATIONS TO BE CONFIRMED WITH MANUFACTURER INSTALLATION DRAWING. 8. ALL HARDWARE TO BE STAINLESS. ALL HARDWARE TO BE STAINLESS. 9. MARPORT HYDROPHONE OUTBOARD MOUNTING ANGLE RESERVED.MARPORT HYDROPHONE OUTBOARD MOUNTING ANGLE RESERVED.

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FWD

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NEW HYDROPHONE WELL P/S SEE NOTE 6

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NEW MARPORT HYDROPHONE P/S, SEE NOTES 4 & 9

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10' WATERLINE ABL

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SECTION 1-C

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SCALE: 1" = 1'-0'"

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SECTION 2-C

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SCALE: 1" = 1'-0'"

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DETAIL 3-C: MOUNTING PLATE

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SCALE: 1" = 1'-0'"

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BOTTOM SHELL

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TRANSOM PLATE

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WELL, 9" LENGTH OF 12" SCH 80 PIPE P/S

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MOUNTING PLATE, 3/8" PL

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MOUNTING TAB, 3/8" PL

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MOUNTING SCREW

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HYDROPHONE CABLE EXIT

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MARPORT HYDROPHONE P/S CENTERED ON MOUNTING PLATE

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SEE NOTE 5

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12" SCH 80 PIPE

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3/4" TYP

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3/8" DIA. FOR 3/8" FLATHEAD SCREWS (1 PER MOUNTING TAB)

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3/8" DIA. W/ COUNTERSINK FOR 3/8" FLATHEAD SCREWS SEE NOTES 4 & 7

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4.85" SEE NOTE 7

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0.86", SEE NOTE 7

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NEW MARPORT HYDROPHONE CENTERED ON MOUNTING PLATE, SEE NOTE 4

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3/8" NUT WELDED TO EACH MOUNTING TAB SEE NOTE 8

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3/8" DIA. W/ COUNTERSINK FOR 3/8" FLATHEAD SCREWS (4 PER MOUNTING PLATE)

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