1. Coastal and Marine Hazards and Resources
  2. Geoscience Data System

Field Activity 2025-313-FA

Identifier 2025-313-FA
Alternate names 25BIM03 = WVR1; 25BIM04 = WVR2
Purpose To collect 2025 pre-hurricane season bathymetry for Midnight Pass and Milton Pass that were recently created by the 2024 storms Helene and Milton. Updated bathymetry is needed to monitor geomorphological changes in the pass and track sediment distribution patterns.
Location Midnight Pass is located Siesta Key, FL; Milton Pass is located in Englewood, FL
Summary 84.2 Km of single-beam bathymetry data collected. 12 Sound Velocity Profile (SVP) Casts taken.
Info derived Bathymetry x, y, z data points to create 2025 digital elevation models as well as being applied in other analysis
Comments Funding account = GX23MN00V02FL25
Projects
Platform
Personal Water Craft (Blue WVR2 - Chum)
Blue WaveRunner; R/V Chum
Personal Water Craft (White WVR1 - Shark)
White WaveRunner, R/V Shark
22-ft Twin Vee (R/V G. Hill)
This boat has a carrying capacity of up to 1500 pounds and up to 7 people and a shallow draft (9 inches empty). This boat's cat hull design results in a smoother ride in choppy water, at the expense of a slightly deeper draft. This boat is powered by two Yamaha 70hp motors.
Vehicles
Ford F-250 Stone Grey
Ford F-350 Dually White (GSA)
Itinerary
Start Siesta Key, FL 2025-06-24
End Englewood, FL 2025-06-26
Days in the field 3
Marine operations Yes

Personnel

Organization
600 Fourth Street South
St. Petersburg, FL33701-4846
(727) 502-8000
Principal investigators Kara S DoranJennifer A Brown
Crew members
Affiliate principal USF
Affiliate staff Ping Wang

Data types and categories

Data category: Sonar, Location-Elevation
Data type: Sound Velocity, Single Beam, Benchmarks

Equipment used

Equipment Usage description Data types Datasets
Castaway-CTD Sound Velocity (no data reported)
Tripod Mooring (physical oceanography), Benchmarks, Navigation (no data reported)
SP90 GNSS Receiver Benchmarks, Navigation 2
SBG Ellipse A Motion Sensor Single Beam (no data reported)
ODOM-Echotrac CV-100 Single Beam 6

Datasets

Datasets produced in this activity

Dataset name Equipment Description Dataset contact
Midnight_Pass_2025_SBES_WGS84_G2296_UTM17N_tracklines SP90 GNSS Receiver Single-beam bathymetry trackline shapefile in WGS84 (G2296) UTM 17N (.shp). Christopher C Bemelmans
Milton_Pass_2025_SBES_WGS84_G2296_UTM17N_tracklines SP90 GNSS Receiver Single-beam bathymetry trackline shapefile in WGS84 (G2296) UTM 17N (.shp). Christopher C Bemelmans
Midnight_Pass_2025_SBES_1m_DEM_WGS84_G2296_UTM17N ODOM-Echotrac CV-100 Single-beam bathymetry DEM, 1-m cell size in WGS84 (G2296) UTM 17N (.tif). Christopher C Bemelmans
Midnight_Pass_2025_SBES_NAD83_NAVD88_GEOID18_UTM17N_xyz ODOM-Echotrac CV-100 Single-beam bathymetry data points (xyz) in NAD83 and NAVD88 (orthometric height) with respect to the GEOID18 model UTM 17N (.txt). Christopher C Bemelmans
Midnight_Pass_2025_SBES_WGS84_G2296_UTM17N_xyz ODOM-Echotrac CV-100 Single-beam bathymetry data points (xyz) in WGS84 (G2296) UTM 17N ellipsoid height (.txt). Christopher C Bemelmans
Milton_Pass_2025_SBES_1m_DEM_WGS84_G2296_UTM17N ODOM-Echotrac CV-100 Single-beam bathymetry DEM, 1-m cell size in WGS84 (G2296) UTM 17N (.tif). Christopher C Bemelmans
Milton_Pass_2025_SBES_NAD83_NAVD88_GEOID18_UTM17N_xyz ODOM-Echotrac CV-100 Single-beam bathymetry data points (xyz) in NAD83 and NAVD88 (orthometric height) with respect to the GEOID18 model UTM 17N (.txt). Christopher C Bemelmans
Milton_Pass_2025_SBES_WGS84_G2296_UTM17N_xyz ODOM-Echotrac CV-100 Single-beam bathymetry data points (xyz) in WGS84 (G2296) UTM 17N ellipsoid height (.txt). Christopher C Bemelmans

Publications

Samples collected during this field activity