On 7 Dec 1941, the US Naval base, at Pearl Harbor, Hawai’i, was attacked from the air. Among the many vessels that were lost, the USS Arizona and USS Utah are now National Historic Landmarks, under the care of the National Park Service. Multibeam Sonar, LIDAR, and photogrammetry were used to survey the ships, monuments, and other historical structures. These data will be tied together to create a 3D visualization of the underwater and above-water structures; providing a valuable tool to allow the US Park Service to monitor degradation of the ships over time. The data will also be used to give park visitors a unique view of the ships.
The Sonic 2024 was used to survey most of the Arizona using a small vessel of opportunity. Due to very shallow water and the Memorial itself, a Sonic 2020 was mounted on an Unmanned Surface Vessel (USV) to survey the areas where the manned vessel could not survey. The USS Utah was surveyed solely with the Sonic 2024. R2Sonic’s I2NS provided inertial navigation. QPS QINSy software was used for the multibeam data collection. Multibeam data were post processed in QINSy, Fledermaus, and HyPack. Applanix POSPac processing was also employed for PPK positioning. LIDAR was used to scan the above-water structures. Dive teams performed visual inspection and photographed the hull structures.
A big mahalo goes out to the following:
National Park Service for coordinating the activities;
Autodesk’s Stategic Projects division for project management, tying all the data together, and underwater photogrammetry;
R2Sonic for the bathymetric survey and post processing the 2024 data;
Etrac for supplying bathymetric survey talent and post processing the 2020 data;
Deep Ocean Engineering for providing the USV for the 2020 survey;
Gilbane Building for providing land surveying and LIDAR;
U.S. Navy dive team and the U.S. Navy Public Affairs.
The discovery of HMS Erebus, one of Sir John Franklin’s two lost ships, is a significant occasion for Fisheries and Oceans Canada as it showcases the important work of the Canadian Hydrographic Service (CHS) and the Canadian Coast Guard (CCG). Along with public and private partners, the Canadian Hydrographic Service and the Canadian Coast Guard conducted the 2014 Victoria Strait Expedition with a number of common objectives such as mapping Canada’s Arctic seabed, promoting arctic research and searching for the lost ships of Sir John Franklin’s 1845 voyage to find the Northwest Passage. The data collected from the Canadian Hydrographic Service’s R2Sonic 2022 multibeam sonars was used to produce a three-dimensional model of HMS Erebus that was used by marine archeologists from Parks Canada to confirm the identification of the wreck. The multibeam data will continue to be used by archaeologists and researchers as they conduct further analyses of HMS Erebus. YouTube video. Wikipedia article.
CSL Kinglett and CSL Gannet – two 7-metre hydrographic launches each equipped with R2Sonic 2022 multibeam sonar, Applanix POSMV V5 position and orientation system, AML Oceanographic sound velocity sensors and utilizing Hypack/Hysweep for data collection. The survey was conducted using post processed kinematic positioning derived from Applanix POSPac MMS. Data processing and image rendering was completed using CARIS HIPS.
2014 marks the 70th Anniversary of the Allied landings on the beaches of Normandy – better known as D-Day. The vast naval operation resulted in many vessels being sunk by mines, enemy fire or submarines. A large scale hydrographic survey was organised to map and document the state of those wrecks. R2Sonic’s U.S. agent, Measutronics (Lakeland, FL), provided much of the equipment required for the survey, including their Sonic 2024. R2Sonic provided an UHR (700 kHz) upgrade to Measutronics’ Sonic 2024. R2Sonic also provided survey personnel support to assist in setting up and getting the multibeam survey operations off to a good start. Hypack was used for data collection and presentation in the television documentaries.
The results of the survey are documented in the following television programmes and will be presented as a movie to the veterans and dignitaries at the D-Day Anniversary ceremony in France (06 June 2014):
US: NOVA (PBS) “D-Day’s Sunken Secrets” 2 hours
UK: Channel 5 “D-Day’s Sunken Secrets” 1 hour and very different from the NOVA programme of the same name
France: “Opération D-Day La cartographie des épaves du débarquement”
Data collected using the Sonic 2024 sonar.
37 metres max depth, shallowest part of hull 17 m depth. Hull length approximately 85m.
Location: 37° 52.1617′, -122° 25.2500′. Marked on nautical charts as a hazard, wreck name and type is unknown. 3D anaglyphs were produced using in-house experimental software.
Data collected using the Sonic 2024 sonar at 700 kHz (UHR) and 400 kHz, using QINSy, Qloud, and rendering in Feldermaus.
Data is a composite of 3 lines. 24 metres depth. Survey by Swathe Services.
Additional reference: DiveSiteDirectory
Data collected using the Sonic 2024 sonar at 400 kHz using QINSy. 21 metres depth.
Additional reference: Wikipedia
Data collected using the Sonic 2024 sonar at 400 kHz using Hypack, edited on Fledermaus. 8 to 20 metres depth.
Survey by Aspect Land & Hydrographic Surveys.
Data collected using the Sonic 2024 sonar at 400 kHz using QINSy data collection software.
Quay in Valparaiso showing marine growth and displaced blocks. Vessel is Bentos survey boat.
Data collected using the Sonic 2024 sonar at 400 kHz using QINSy data collection software and Fledermaus visualization software.
Test mapping area and objects around the Breakwater Fort in 11 metres water depth.
Data collected using the Sonic 2024 sonar at 400 kHz using QINSy and QLoud data collection software.
Curtin Artificial Reef, Moreton Bay, Australia. Numerous barges, ships, concrete pipes, bouys, and tires make up this reef.
Water depth is approximately 25 metres.
Data collected using the Sonic 2022 sonar at 400 kHz using QINSy and QLoud data collection software.
Data collected using the Sonic 2024 sonar at 400 kHz using PDS 2000 data collection software..
Data collected using the Sonic 2024 sonar at 400 kHz using HYPACK data collection software.
Survey data near the edge of the Tokyo Canyon.
Data collected using the Sonic 2024 sonar at 400 kHz, 20 us pulse width and PDS 2000 data collection software.
Data collected during demo using the Sonic 2024 sonar at 400 kHz, 20 us pulse width and QINSy data collection software.
Data collected by eTrac using the Sonic 2024 sonar and QINSy data collection software.