FD-SS900 Side-Scan Sonar

FD-SS900 Integrated Scanning Sonar

Technical Specification

1.Purpose of the Equipment

The FD-SS900 is a side-scan sonar designed for UUVs, ROVs, USVs, and small surface vessels.

Unlike conventional embedded side-scan sonars, this system integrates all electronic components into a single underwater unit, requiring only Ethernet connectivity and power supply. This design eliminates the need for dedicated electronic compartments, saving valuable space and simplifying integration onto the carrier.

The side-scan functions operate at either 450 kHz or 900 kHz, selectable at the time of purchase.. The sonar's maximum operating depth is 300 meters by default, with 1500m and 3000m models available for order.

2. Technical Specifications

2.1. Technical Specifications for Side-scan Functions

（1） Center frequency: The standard options are 450kHz and 900kHz, which should be specified during ordering. Additional frequencies are available upon request.

（2） Detection range, beam width, and beam opening angle (maximum detection range applies to strong reflection targets such as rocks, coastlines, etc., under conditions of clear water, flat sandy seabed, good or moderate hydrological conditions, and speed <6 knots):

Note ：

1. The single transmit-receive field of view of the sonar. Large targets within this angle can be observed by the sonar, but the resolution, clarity, and detection range at the edges may be lower than at the center.

2. The detection distance of high reflectivity objects such as embankment and bridge pier in seawater under good hydrological conditions is about 1~1.5 times that in fresh water under the same conditions.

（1） Distance resolution: 10mm;

（2） Transmission mode: CW or CHIRP, with automatic or manual selection;

2.2. Electrical Interfaces

（1）  Input voltage: 18 to 24VDC;

（2） Power consumption: The average power is approximately 5W, with peak power below 20W.

（3）  Communication interface: 1 Ethernet port;

（4）  External connectors: 16-pin waterproof connector for transmitting network and power signals;

2.3. Mechanical Specifications

（1）  Volume (width*height*thickness, excluding connectors and cables):

377(±1) x 57(±1) x 31(±1)mm；

（2） Weight (air/water, excluding cable):

300m type: approximately 900g/300g;

1.5km type: approximately 1.5kg/900g;

（3） Installation: Secure with M5 screws at the base.

（4） Materials: aluminum alloy (300m type), titanium alloy (1.5km and 3km types), polyurethane;

（5）  Surface treatment: surface oxidation (300m type) and metal color (1.5km and 3km types).

（6）  Internal non-magnetic design;

（7） The surface is smooth without burrs or sharp edges.

2.4. Data Interaction and Display Control

Users can control the sonar device in the following ways:

1. Our proprietary SapphireViewer display control software enables comprehensive sonar operation, compatible with Windows, Linux, and Mac OS.

2. The company provides a free SDK, enabling users to develop their own software for operating sonar.

2.5. Technical Specifications of "Seven Attributes"

2.5.1. Reliability

（1） The mean time between failures：MTBF ≥1000 hours (design specification).

2.5.2. Security

（1） Functional modules should be designed for easy replacement and structural disassembly.

（2） Provide all necessary spare parts, accessories, and consumables based on operational and maintenance requirements.

（3） Equipped with dedicated transport containers for easy transportation and storage.

2.5.3. Testability

（1）  Features a power-on self-check function, which enables fault localization and analysis to pinpoint the affected functional module when a malfunction occurs.

2.5.4. Maintainability

（1）  The sonar lacks user repairability, requiring complete replacement after failure.

（2） For users, the manufacturer will provide free repairs for any non-human-induced or improper-use failures occurring within the first year of purchase.

（3）  Manufacturers provide lifetime warranty and maintenance services.

2.5.5. Safety

（1） The features a power failure protection mechanism, ensuring that unexpected power loss does not compromise the performance of the forward-looking sonar. After a power outage, the system will delay power restoration by 10 seconds, maintaining normal sonar operation.

（2） Equipped with high-voltage protection measures, and its internal sonar generates transient high voltage, which poses no safety risk to operators during normal debugging and operation.

（3） When the transducer array is submerged in water, the device can be powered on normally without damaging the transducer array.

2.5.6. Environmental Adaptability

（1）  Operating temperature: -10℃ to +50℃ (design specifications);

（2） Storage temperature: -40℃ to +70℃ (design specifications);

（3） The design should be simple in structure and appearance, provided that the functional requirements and intended usage conditions are met.

（4）  Select electronic components, wires, and standard parts that are resistant to extreme temperatures to meet environmental temperature requirements.

（5）  All connectors mounted on the circuit board are secured to prevent loosening caused by shock or vibration.

（6） Circuit boards are treated with conformal coating or potting (if required by the customer).

2.5.7. Electromagnetic Compatibility Requirements

（1） The electromagnetic compatibility design meets the self-compatibility of the system;

（2） Meet shielding requirements without interfering with other devices in the same system or electromagnetic environment, nor being affected by them to ensure its own normal operation.

3. Mechanical dimensions of appearance

4. Detection of Open Angle Diagram

5. Cables, Connectors and Definitions

5.1. Connector and Description

The sonar connector is located at the tail end. The waterproof connector supports wet insertion and removal, as shown in the table below.

5.2. Connector Pin Definitions