C1.5 Attachment 3 SCl Island Survey - Revised 03 Jul 2018.pdf

San Clemente Island NOTS Pier Area Mooring System

Survey Results Todd Pickering, 56420 Matt Ridout, 56420

July 2018

UNCLASSIFIED

DISTRIBUTION STATEMENT D: DISTRIBUTION AUTHORIZED TO DEPARTMENT OF DEFENSE AND U.S. DOD CONTRACTORS ONLY; CRITICAL TECHNOLOGY OR VULNERABILITY, (JUNE 2010).

OTHER REQUESTS FOR THIS DOCUMENT SHALL BE REFERRED TO SPACE AND NAVAL WARFARE SYSTEMS CENTER, PACIFIC, CODE 56420, 53560 HULL STREET, SAN DIEGO, CA 92152-5001.

DESTRUCTION NOTICE: DESTROY BY ANY METHODS THAT WILL PREVENT DISCLOSURE OF CONTENTS OR RECONSTRUCTION OF THE DOCUMENT.

Overview

• The following slides contain summary images and details from 3 separate surveys

• Orca Maritime, July 2017

• Navy EOD MK18 training work, Oct 2016

• SSC Dive Locker Inspection Dives, May 2016

• Present day status

• The only remaining buoy is the NE pegtop buoy.

• The other 3 buoys are no longer present and the chain, clumps, and anchors are on the bottom.

SPAWAR Systems Center San Clemente Island Bottom Survey

Orca Maritime, Inc.

For SSC Pacific Code 56420

July 17‐20, 2017

• The following slides contain images and details from the July 2017 Orca Maritime survey completed on the mooring system and test site area.

• This work was done for SSC Pacific under SSC Pacific Contract #: N6600117P6702

• Survey using sidescan survey equipment over 3 days.

North East Mooring Area

South East Mooring Area

North West Mooring Area

South West Mooring Area

San Clemente Island

NOTS Pier

NE Mooring Area

NE Mooring Area Contacts

NE_CONTACT #2

Water Depth: 42.56 Meters Position: 32.9886N 118.5398W

● Target Height: 1.1 Meters

● Target Width: 1.1 Meters

● Target Length: 3.4 Meters

● Target Shadow: 10.1 Meters

NE_CONTACT #1

Water Depth: 41.07 Meters Position: 32.9887N 118.5397W

● Target Height: 1.3 Meters

● Target Width: 1.4 Meters

● Target Length: 3.4 Meters

● Target Shadow: 10.7 Meters

Potential Mooring Hardware, NE Position

NE_CONTACT #3

Water Depth: 37.72 Meters Position: 32.9889N 118.5402W

● Target Height: 0.1 Meters

● Target Width: 21.1 Meters

● Target Length: 32.0 Meters

● Target Shadow: 0.1 Meters

SE Mooring Area

SE Mooring Area Contacts

SE_CONTACT #3

Water Depth: 38.68 Meters Position: 32.9886N 118.5398W

● Target Height: 0.8 Meters

● Target Width: 1.4 Meters

● Target Length: 2.8 Meters

● Target Shadow: 6.3 Meters

SE_CONTACT #1

Water Depth: 37.22 Meters Position: 32.9853N 18.5365W

● Target Height: 0.4 Meters

● Target Width: 1.2 Meters

● Target Length: 3.5 Meters

● Target Shadow: 1.5 Meters

Potential Mooring Hardware, SE Position

SE_CONTACT #2

Water Depth: 39.75 Meters Position: 32.9855N 118.5376W

● Target Height: 1.3 Meters

● Target Width: 3.2 Meters

● Target Length: 4.3 Meters

● Target Shadow: 11.4 Meters

SE_CONTACT #4

Water Depth: 37.26 Meters Position: 32.9852N 118.5370W

● Target Height: 0.9 Meters

● Target Width: 1.3 Meters

● Target Length: 1.5 Meters

● Target Shadow: 2.1 Meters

NW Mooring Area No Contacts Detected

SW SSS of Buoy Anchors

SW Mooring Area No Contacts Detected

Survey from EOD MK18, Oct 2016

• Topside visual inspection:

• Northwest Buoy – Not Present Southwest Buoy – Present (currently not present)

• Southeast Buoy – Not Present

• Northeast Buoy – Present

• PMD Report: SN06288‐ 20161005

• Run Time: 05OCT2016 1245 – 1331 / Duration: 0 hr 45 min 30 sec

Northwest Mooring Leg‐Buoy not Present

1.

1. 32N 59.203, 118W32.398 (Assumed to be Northwest Buoy)

2.

1.

1. 32N 59.203, 118W32.398 (buoy)

2. 32N 59.196, 118W32.389 (anchors / clump)

3.

1.

1. 32N 59.204, 118W32.398

3. 32N 59.197, 118W32.392 (clump)

Southeast Mooring Leg‐Buoy Not Present

4.

4. 32N59.127, 118W32.257 (Assumed to be Southeast Buoy)

5.

5. 32N59.109, 118W32.243 (Clump / Chain appears to be attached to 4.)

5.

3. 32N59.108, 118W32.242

SW Clump NW Clump NE Riser Chain

SSC Pacific Dive Locker and ROV Surveys

ROV Survey

• SSC Dive Locker Inspection Dives, May 2016

• Images captured from video inspection

• SSC ROV Survey, Mar 2016

• Images captured from video inspection

• SE mooring leg not found