# General Specifications

### Topside Units

<table><thead><tr><th width="359.3306884765625">Parameters</th><th width="100.7845458984375">GNSS Sync (Mk II)</th><th width="110.0028076171875">Acoustic Sync  (Mk III)</th><th width="107.80810546875">Network Sync  (Mk V)</th></tr></thead><tbody><tr><td>Maximum Depth Exposure (minimum crush depth)</td><td>50m</td><td>50m</td><td>50 m</td></tr><tr><td>Volume</td><td>400 ml</td><td>480ml</td><td>400 ml</td></tr><tr><td>Mass</td><td>335g</td><td>600g</td><td>325g</td></tr><tr><td>Weight in Water</td><td>-65g</td><td>-120g</td><td>-75g</td></tr><tr><td>Absolute Maximum Range</td><td>500m</td><td>300m</td><td>300m</td></tr><tr><td>Typical Maximum Usable Range</td><td>500m</td><td>300m</td><td>300m</td></tr><tr><td>Apparent Yaw/Azimuth resolution</td><td>0.1° </td><td>0.1° </td><td>0.1° </td></tr><tr><td>Apparent Elevation angle resolution</td><td>0.1° </td><td>0.1° </td><td>0.1° </td></tr><tr><td>Slant range measurement resolution</td><td>0.1m</td><td>0.1m</td><td>0.1m</td></tr><tr><td>IMU Euler angle accuracy, typical (magnetic errors not included)</td><td>2° </td><td>2° </td><td>2° </td></tr><tr><td>Slant range error accumulation</td><td>1 m/hr</td><td>-</td><td>-</td></tr><tr><td>Update rate</td><td>1 Hz</td><td>1 Hz</td><td>1 - 5 Hz, range dependent</td></tr><tr><td>Ping Frequency</td><td>-</td><td>25kHz</td><td>-</td></tr><tr><td><p>Transmit Acoustic Power Level, typical, re: 1uPa </p><p>at 1 meter distance</p></td><td></td><td>185dB </td><td></td></tr><tr><td>V-in power </td><td>5V to 28V DC, ~1.5 Watt (note 1)</td><td>5V to 28V DC, ~1.5 Watt <br>(note 1)</td><td>5V to 28V DC, ~1.5 Watt<br>(note 1)</td></tr><tr><td>Serial Comms Voltage Levels</td><td><p>3.3V TTL or</p><p>5V TTL, auto sense</p></td><td><p>3.3V TTL or</p><p>5V TTL, auto sense</p></td><td><p>3.3V TTL or</p><p>5V TTL, auto sense</p></td></tr><tr><td>Ethernet, megabits/sec</td><td>10/100</td><td>10/100</td><td>10/100</td></tr></tbody></table>

### Deepside Units

<table><thead><tr><th width="339.138671875">Parameters</th><th width="108.6859130859375">GNSS Sync  (Mk II)</th><th width="108.6859130859375">Acoustic Sync  (Mk III)</th><th width="110.00244140625">Network or Acoustic Sync  (Mk V)</th></tr></thead><tbody><tr><td>Maximum Depth Exposure (minimum crush depth)</td><td>300 m</td><td>300 m</td><td>300m</td></tr><tr><td>Volume</td><td>400 ml</td><td>400 ml</td><td>250 ml</td></tr><tr><td>Mass</td><td>300g</td><td>300g</td><td>440g</td></tr><tr><td>Weight in Water</td><td>-100g</td><td>-100g</td><td>170g</td></tr><tr><td><p>Transmit Acoustic Power Level, typical, re: 1uPa </p><p>at 1 meter distance</p></td><td>185dB</td><td>185dB</td><td>185dB</td></tr><tr><td>V-in Power Allowable Voltage, DC</td><td>5V to 28V <br>(note 1)</td><td>5V to 28V <br>(note 1)</td><td>10V to 28V <br>(note 2)</td></tr><tr><td>V-in Power @5V</td><td>1.4W</td><td>1.7W average 2.9W peak</td><td>-</td></tr><tr><td>V-in Power @16V</td><td>not given</td><td>1.3W average, 4.1W peak</td><td>3W</td></tr><tr><td>V-in Power @28V</td><td>1.6W</td><td>not given</td><td>not given</td></tr><tr><td>Serial Comms Voltage Levels</td><td><p>3.3V TTL or</p><p>5V TTL, auto sense</p></td><td><p>3.3V TTL or</p><p>5V TTL, auto sense</p></td><td><p>3.3V TTL or</p><p>5V TTL, auto sense</p></td></tr><tr><td>Ethernet, megabits/sec</td><td>-</td><td>-</td><td>10/100</td></tr></tbody></table>

{% hint style="info" %}
Note 1: Voltage is specified at the terminals of the printed circuit board of the device, user must ensure there is sufficient voltage after the cable voltage drop. Power supplies for all units must be able to supply burst currents to prevent drop-out and erratic operation. While the Mk II/Mk III transmitters will work with a low impedance 5V supply we recommend using 9V or higher, unless you know how to figure out if your 5V power supply is low-enough impedance.&#x20;
{% endhint %}

{% hint style="info" %}
Note 2: Voltage is specified at the terminals of the printed circuit board of the device, user must ensure there is sufficient voltage after the cable voltage drop. Power supplies for all units must be able to supply burst currents to prevent drop-out and erratic operation. The Mk V transmitter can run at a ping rate of up to 5 Hz, and during the ping event at high rates it can draw a large current burst (up to 3A depending on supply voltage and wiring impedance) for a very short time (500 uS). An ROV battery can easily accommodate these bursts. A simple PoE injector or power supply may brown out during these events, which will cause the transmitter to reboot. For bench testing we recommend turning off high-rate pinging.&#x20;
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**Note: Resolution ≠ Accuracy**! See [accuracy expectations](https://docs.ceruleansonar.com/c/ethernet-rov-locator/accuracy-expectations).
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