1. 32-Bit Multibeam Editor ‘MBMAX32’

2. MBMAX32 Introduction Survey is Done, Now What? Need to apply Tide and Sound Velocity corrections. Adjust Device Offsets if required. Remove outliers from support sensors (GPS for example). Remove all multibeam flyers. But keep all the good points! Save to file when done. Re-edit if needed. MBMAX32 menu, tool bar and line selector.

3. Use Memory Mapped Files Multiprocessor Mode Distribute calculations to up to 8 processors. Speed Enhancement Comparison: Single vs. Multiple Processor Mode Use Tools menu, MBMAX Configuration for Speed Options.

4. MBMAX Stage One Check Raw Parameters Stage Two Swath-Based Editing Stage Three Area-Based Editiing HS2 HSX HYSWEEP SURVEY HS2 XYZ VEL TID MBMAX32 - Data Flow GSF HYPACK SURVEY RAW XYZ

5. MBMAX32 - Starting Up Select Files Choose individual files or Select All (up to 255 per session). Launch MBMAX32: Menu Input File Formats HSX: Native format of HYSWEEP® Survey. HS2: MBMAX edit format. RAW: Native format of HYPACK® Survey. XYZ: ASCII files. XTF: XTF files should be converted to HSX in SIDE SCAN DATA REFORMATTER before being run through MBMAX.

6. MBMAX32 - Starting Up Open Options Process in Depth or Elevation mode. Auto Processing  Hands off edit and save with filtering.  Good for a ‘quick look’ or perhaps export to CUBE.  Not commonly used.

7. Corrections Tide File: If using files from Manual Tides. For RTK TIDES, leave the Tide File blank and Enable the settings in the Read Parameters Window – Selections and Advanced Tabs. SV File: If using files from Sound Velocity program. (Note: If a Tide and/or SV File are loaded here, they will override any embedded data in the file headers) Multiple SV Profiles Enter the time of each cast. MBMAX32 - Corrections

8. Read Parameters Read Parameter Tabs Selections: Select devices. Option to load sidescan to aid editing. Device Info: Change offsets if necessary. Survey Info: Some settings and information from the survey file. Presort: Simple data thinning removes 50 - 90% of sweeps. GPS Pre-Filter: Ignore GPS records (Position and/or RTK Tides) based on GPS quality values. Advanced Read Parameters RTK Tides: Selections to avoid double correction. Correct for Induced Heave: If MRU is not at boat CG. Remove Heave Drift: Averaging method nullifies drift. Adjust SV Profile…: Replace top of profile with sensor reading at the head. Ray Tracing: Select Line or Arc Method or let MBMAX decide based on profile depth and sampling.

9. Phase 1 - Raw Data Review Line by Line Review Check that devices are working – no flat lines. Check for heave drift. Block or point edit track lines. Use mouse wheel to zoom, right click to pan. Block or point edit RTK tides. step between files. Arrows step between files.Tide graph: White is raw, Red is processed RTK tide. There’s editing to do! RTK tide and position spikes and heave drift.

10. Adjustment Tools AVI Example: Heave Adjustment Open file containing corrected (delayed) heave.Open file containing corrected (delayed) heave. Enter hour difference, local minus UTC time.Enter hour difference, local minus UTC time. Click Adjust to finish.Click Adjust to finish. Verify it worked by comparing the heave graph before and after adjustment.Verify it worked by comparing the heave graph before and after adjustment. Data Adjustment in MBMAX32 Tide Adjustment, Centerline Method  Interpolates tide from stations spaced along the centerline. Tide Adjustment, 3 Point Method:  Planer tide interpolation from 3 stations. Tide Adjustment, Tide Offset  Simply adds an offset to tide values. Heave Adjustment (Delayed Heave), POS/MV and F180:  Applies corrected heave from files logged by the inertial system. Works great!

11. Adjustment Tools More Data Adjustments… POSPac Adjustments:  Applies corrected position, pitch, roll and heading from POSPac *.OUT files.  Option to recalculate RTK tides (below). HYPACK RAW File Adjustments:  Replace positions with GPS data recorded to the RAW file.  Option to recalculate RTK tides (below). RTK Tide Recalc: Set project geodesy for RTK tides (Geoid model, KTD file, VDatum, etc.) MBMAX: Recalculate tides from project geodesy and WGS latitude, longitude, elevation.

12. SV Interpolation Option to Load Multiple SV Profiles Select multiple VEL files. Enter cast times. SV profile is interpolated for each ping. (Based on ping time, not location.) Interpolated cast is in white. Limit of 48 VEL files. Using an MVP: Cast data collection and logging is done while underway. Cast files (VEL format) are time tagged automatically. VEL profiles with time of cast. and Raw profiles and times (colors). The interpolated profile is in white.

13. SVP Extension Goal: A reasonable profile beyond the reach of an ocean cast. Based on a model of Temperature, Pressure and Salinity. Salinity is relatively constant. Decreasing SV to 1000 meters (decreasing temperature). Increasing SV below 1000 meters (increasing pressure). T (deg C)S (PPT)Z (decibar)SV (m/sec) 934.05001493 634.110001490 334.220001494 234.330001507 235.0100001631

14. Phase 2 – Swath Editing Line by Line Review Transition Phase 1 to 2: “Convert Raw to Corrected” in File menu. Use Filters to remove gross errors. Review each line graphically with Manual Edits if needed. Second Sweep Window for comparison. Sounding Info for details.

15. Filters… Part 1 Search and Filter Settings Spike: Removes points deviating from median depth (5 soundings). Be Careful: Can remove good soundings as well! Quality: Filters based on sonar quality code. Intensity: Filters based on beam intensity value. Overhang: Looks for overhang pattern in sweep profile, and removes it. Works great! Safe unless you’re trying to sound underneath rocks. Overhang example

16. Filters…. Part 2 Use HYSWEEP® Survey Limits: Filter based on settings used during the survey. Savitsky-Golay: Low pass filter based on curve fitting.  Low to High: Avoids removing good points. Doesn’t always work. Sometimes removes entire sweeps!  Gate Size: Allowable distance from curve.  Order: Flexibility of curve. Order 2 = straight line.  Window Size: Number of soundings used in curve fit.

17. Sound Speed Adjustments Depth profile from a single sweep: Try to flatten it out. Bottom slope Bottom curvature: flat bottom = zero curvature. Sound Velocity Profile (Works best in flat areas) Adjustment Toolbox Important Assumption: Sound Velocity from the sensor at the sonar head is correct. Something needs to be right!

18. Sound Velocity Adjustments Example 1: Moving Salt Water Wedge Before: Bottom curvature is clear – the smiley face. Action: Block out the salt water wedge and shift it downward (Down Button). Tide’s going out. Result: A clear improvement. Each survey line can be corrected this way.

19. Sound Velocity Adjustments Example 2: Missing SV Profile Before: Very poor depth data without a sound velocity profile. Action: Use New Profile option. Experiment with Gradient until the bottom flattens out. Result: New SV profile Greatly improved depth data.

20. Sweep Windows Graphical Review and Manual Editing Two windows, each with it’s own zoom level and perspective. Zoom, rotate and pan to see and ‘get at’ difficult points. Eraser, Block and Line Editing tools. Fast Edit Mode for block and line tools. 1,000 levels of Undo. Yellow X = points outside filter limits. The old graphics modes are still available.

21. View and Edit Options Sweep Tab Display Style  Wiggle, Dot and TIN methods use standard Windows® graphics.  Enhanced Sweep Graphics mode supports pan / rotate / zoom and requires OpenGL. Edit Mode (for Block and Line delete)  Default: Points are selected but not removed until the delete tool (inside/outside block or above/below line) is pressed.  Fast: The delete tool is pre-selected and points are removed as soon as the mouse button is released. Hence 1,000 levels of Undo! Block/Default mode. Click inside or outside button to delete. Block/Fast mode with delete inside pre- selected. Line/Default mode. Click above or below button to delete. Line/Fast mode with delete above pre- selected.

22. More Editing Tools F5: Marks a target. Undelete Block: Restores deleted points within the blocked area. Point Flag: Flags a questionable sounding for examination in Phase 3. Sidescan: Shows the sidescan record to assist editing. If it shows up on sidescan, don’t delete it. Hand: Toggles Rotate/Pan Mode on/off  Rotate/Pan On: Mouse pointer is a hand. Mouse drag pans or rotates the display.  Rotate/Pan Off: Mouse pointers is an arrow. Mouse drag places an edit block or line on the display. Point Flag helps you locate a point later. Sidescan record. Arrows give sounding location.

23. Phase 3 - Area Based Editing All Lines Combined Transition Phase 2 to 3: “Area Based Editing” in File menu. Soundings are grouped in matrix cells for statistics and display. Three Windows: Survey (all data), Profile (matrix row) and Cell. Profile Window Survey Window Cell Window

24. Matrix Options Transition to Phase 3 Use existing HYPACK® MTX file or, Auto-Size to data. Very convenient.  Option to Rotate to Survey Line is useful as profiles will cut across the channel. Cell Size:  Auto Cell Size determines best fit, about 25 soundings per cell. Enough for reasonable statistics. Matrix Options selected on transition to Phase 3.

25. Editing Windows Survey Window Overview of the entire survey. 3-D zoom, pan, tilt and rotate to help interpret the soundings and select areas of interest. View depths or statistics. Profile Window Survey cross section. Color coding by survey line makes it easy to compare overlap. Cell Window Cell statistics; table and histogram. Flyers stand out!

26. Statistical Search and Filter Search and Filter Options Select a statistic to represent each cell. Median works well. Select limits above and below. Then:  Filter. Be careful not to over-filter.  Search. Locates marginal soundings then you decide. Filter Limits (yellow) in Cell Window

27. Save Your Work Choose a File Format HS2: For additional editing (MBMAX, CUBE, Cloud). For export (e.g., Fledermaus). XYZ: For export and additional processing (e.g., TIN Model). XYZ, Intensity: For intensity mapping. XY, Surface SV: For mapping surface sound velocity. GSF: Generic Sensor Format. For GEOCODER. XYZ Reduction Save one XYZ point per cell. Select survey depths or statistics. Save HS2 at any time during an edit session. Save early and save often!

28. Save Examples Save XY, SV: Surface SV Map Use surface SV collected by the multibeam system.Use surface SV collected by the multibeam system. Save XYZ: Survey Uncertainty Use the Multiplier and Save 2 times cell std. deviation for a 95% confidence uncertainty map.Use the Multiplier and Save 2 times cell std. deviation for a 95% confidence uncertainty map.

29. Save Examples Save GSF: Snippets Imagery High resolution imagery from HYPACK ® GEOCODER. (GEOCODER can also read the multibeam’s raw snippet data, in combination with HS2 files.) Save XYZ for Cross Sections and End Area Volumes: Use HYPACK® TIN Model to cut cross sections. Import sections into HYPACK® Cross Sections and Volumes.