3-D LiDAR Scanning

Terrestrial 3-D LiDAR Scanning

S.U.E. Utility Locate/Eng

SUE Q/L A (Air & Hydro Vac), B, C & D

Civil Engineering Design

ASE Civil Engineering

Bathymetric/Hydrographic

Multi-beam Bathymetric Surveys and Sub-Bottom Profiling

Land Acq. & Boundary

Land Acquisition and Boundary Surveys

ASE DESIGNS AND COMMISSIONS A CUSTOM-MADE, FULLY EQUIPPED, 22-FOOT RESEARCH MARINE SURVEY VESSEL





In the Spring of 2012, ASE designed and commissioned a 22-foot marine survey vessel that will handle every possible type of bathymetric survey to U.S. Army Corps standards.  Christened the Abraham Lincoln to honor the historic surveyor from our home state, the boat is fully equipped to handle Multi-Beam Echosounding; Single-Beam Echosounding, Sub-Bottom Profiling and Side Scan Sonar work.  The boat was designed by Coventine Fidis, the CEO of American Surveying & Engineering, to be the perfect tool for use on any survey described in the U.S. Army Corps of Engineers manuals on marine surveying.  The boat was built by Scully’s Custom Aluminum Boats in Morgan City, Louisiana, and it joins our existing fleet of boats, including the 32-foot George Washington (which we named in commemoration of another noted surveyor).

 

We designed the Abraham Lincoln to accommodate all possible survey uses from stern to bow.  Horizontal and vertical offsets are measured relative to the longitudinal Center of Gravity (LCG) of the survey vessel. Initial loading of the vessel establishes a waterline marked in four places on the hull of the vessel. The vessel is blocked and leveled in two planes; along the centerline (keel) of the vessel (Y) parallel to the waterline and athwrartship to the centerline (port to starboard).  The LCG is calculated and furnished by the manufacturer of the vessel and is referenced as 0.00, 0.00, 0.00 (forward, starboard, up) in a vessel cartesian coordinate system.  All vessel control points are referenced conventional survey methods using a total station from three (3) distinct survey points surrounding the vessel. A least squares adjustment is performed on all of the control and the adjusted coordinates will be used to develop the offsets to be entered into the Hypack/Hysweep processor.

 

The Abraham Lincoln is packed with specialized surveying instruments and equipment. 

 

Equipment List

R2Sonic 2022 High-resolution multi-beam

Trimble Marine SPS852 Dual Frequency (GLONASS enabled) Real Time Kinematic (RTK) GPS positioning and heading system

Teledyne DMS-10 Motion Sensor

Valeport SV Sound velocity probe

Valeport SVP sound velocity profiler

Trimble Dual Frequency GPS Real Time Kinematic positioning base and rover receivers with RTK radio data link 

This built-in equipment can be supplemented with our Sub-Bottom Profiling equipment and our Side Scan Sonar equipment without sacrificing any functionality.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



                   

 

Survey Accuracy and Equipment Precision

Horizontal positioning for depth measurements uses electronic positioning modes or systems, or hybrid combinations of instrumental and electronic data measurement and recording systems to measure, adjust, correlate, print, plot, and record horizontal and vertical observations.  USACE hydrographic surveying requirements per EM 1110-2-1003 Engineering and Design – Hydrographic Surveying, are followed.

 

R2Sonic Multibeam

R2Sonic 2022 high resolution multi-beam sonar unit is port side mounted on R/V A Lincoln and interfaced to R2Sonic sonar interface module (SIM). The 2022 has on the fly selectable frequencies from 200 to 400 kHz, 1° by 1° beam width, True Range Resolution of 1.25 cm, 500m range and on the fly selectable swath coverage of 10° to 160°.

 

             

 

 

 

 

 

Teledyne DMS-10 Motion Reference Unit (MRU)

This instrument provides measurements of attitude; namely heave, pitch, roll measurements.  The DMS-10 is capable of measuring to the nearest 0.10 degree RMS.  It has a maximum range of 60 degrees, a bandwidth of 0 to 30 Hz and a depth rating of 3000 meters.

 

                                               

 

Data Processing Computer

 

The processing computer is a Dell Precision M660 Workstation Laptop.  Data from the sonar is corrected by the Teledyne MRU and is interfaced to the processing computer on the network with HySweep survey program.

 

Valeport (SV) and (SVP) Sound Velocity Probe and Profiler

 

Sound Velocimeter is attached to the head of the multi-beam echosounder and constantly monitors the speed of sound in the hydrosphere at the head of the sounder.  In addition a Valeport Sound Velocity Profiler is used to make sound velocity casts throughout the survey area as required. Sound velocity is measured in the survey area to the required depth. Every foot is a graphed profile of the speed of sound through the water column and used to correct the survey data.