MOBI buoy

13 50015 000 HT

MOBI real-time acoustic monitoring buoy :

  • Transmission of acoustic levels, alerts or raw data samples without additional subscription fees using  COM link, DATA link
  • Storage capacity: up to 16 TB
  • Frequency range:

All included : 3 Solar panels, Saint Andrew Cross, 3 Radar reflectors, 3 Flashers, GPS, 3G/4G Module, Hydrophone, Rechargeable battery & charger, Storage, DaViS software, Accessory kit

Store category : MOBI Acoustic monitoring buoy


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MOBI is a buoy dedicated to real-time monitoring of underwater acoustic sounds. High acoustic performance is available with 24 bits raw data, 110 dB dynamic range, listening up to 200 kHz and self-noise below sea state zero. While recording, an embedded analysis is carried out to allow the real-time transmission of acoustic levels and alerts in the event of a threshold being exceeded. With a long data transmission range without additional subscription costs, energy self-sufficiency and a large storage capacity of up to 16 TB, MOBI is suitable for coastal or deep sea applications, for short missions or long-term PAM (Passive Acoustic Monitoring).

Key technical specifications

Real-time embedded acoustic analysis
Transmission of acoustic levels, alerts or raw data samples
Large data transmission range without additional subscription fees
Internal raw data storage up to 16 TB
Energy self-sufficent for long-term deployments
Lightweight but rugged
Easy to transport and to deploy from small boats
Configuration and remote software updates over WiFi or radio link (off-shore)

Acoustic analysis :

Several types of acoustic analyzes are available on pulsed events and their cumulative noise or on continuous sounds: the estimation of Sound Pressure Level (SPL) or Sound Exposure Level (SEL) following  ISO, 2017 standards, Third octave band levels following ANSI/ASA S1.11-2014M-weighting levels (Southall et al. 2019).

The evaluation of acoustic features and normative thresholds exceedings is in accordance with regulations, in particular European recommendations (MSFD), French recommendations, American regulations (NMFS) and German regulations.

Configuration WiFi or COM link (off-shore)
Recording mode Continuous or duty cycling
Scheduled mode Immediate or scheduled start
Storage Acoustic data : raw data [.wav] with selectable file duration
Pulse, continuous and cumulative analyze: SPL, Third octave band levels, M-weighting levels
Normative threshold exceeding
Marine mammals detection (future option)
Software update Remote update over WiFi or DATA link (off-shore)
Localization GPS included, mooring failure alerts


Data transmission

Frequency 868 / 915 MHz 2.4 GHz
Acoustic data transmitted
Acoustic features X
Alerts X
Raw data samples X
Range to station
Buoy to shore (alt. 6m) > 23 km > 23 km Depends
on location
Buoy to boat (alt. 6m)
11 km 5 km
Buoy to buoy (used as relay buoys)
8 km 3.5 km X


ADC 24 Bits
Dynamic range 110 dB
Analog gain 0 dB or 12 dB (Software configurable)
Analog high pass
10 Hz or 370 Hz (Software configurable)
Sampling rates LF : 31.25 kSps, 62.5 kSps, 125 kSps
HF : 31.25 kSps, 62.5 kSps, 125 kSps, 250 kSps, 360.36 kSps, 400 kSps
RTC accuracy 1 ppm


Low frequency [LF] Hydrophone HTI-96-MIN Low noise
Analog bandwidth : 2 Hz – 30 kHz
High frequency [HF] Hydrophone HTI-99-UHF Low noise
Analog bandwidth : 2 Hz – 250 kHz
SH for LF & HF Standard : -185 dB re 1V/μPa,
other on request
Connection Remote with Subconn connector


Power & autonomy
Battery Rechargeable lead battery
Battery charger Included
External sources 3 solar panels
Autonomy with
solar panels
Infinite, even in low light conditions
Complete darkness
About 10 days


Memory (Internal micro SD Card)
16 TB


Full volume 100 L
Diameter 650 mm
Folded height 1.66 m
Unfolded height 2.84 m
Height above water 2.17 m
Rugged buoy
Float robustness
PEHD UV15 foam filled
Waterproof level
IP68 extended up to 2.5 m depth
Marking, visibiliy and safety at sea Saint Andrew Cross, 3 Radar reflectors and 3 Flashers meeting the IALA standard and visible at 2 NM
Maintenance Easy by customer in less than : 5 min (flashers, solar panels, radar reflectors) / 20 min (batteries and mast with antennas)