挪威Water Linked DVL A125是比较小的商用多普勒计程仪（DVL）。A125DVL正在建立一个新的市场标准，高性能，超小型4波束，集成AHRS/IMU辅助，开放接口协议和低成本。

      该DVL的设计主要为小型的ROVs/AUVs考虑，安装后不增加明显的重量或对载体的阻力。A50是寻找导航功能的小型水下载体的选择。因为是低成本和高性能的结合，所以对一些大型的水下载体也同样非常有吸引力。

主要特点：

1、自适应算法，工作量程大，0.05 - 125m

2、易于集成，采用内置的以太网和串口115200波特UART 3,3v接口

3、完全独立，不需要外部计算机、控制器或设备

4、集成状态LED，确认设备已通电，是否海底已锁定

5、非常小的尺寸，便于安装和与其他设备集成

6、低功耗

7、非常坚固，可在海底起伏变化环境下工作

8、集成AHRS/IMUs以提高准确性

9、网页界面，可诊断设备

10、发射频率：420 kHz

Capable of maintaining bottom lock at speeds of up to 9 meters per second, and with a maximum altitude of 125m, the A125 is the perfect DVL for ROVs, USVs and AUVs. The ability to also operate at an altitude as low as 5cm means the DVL will work at extremely short range as well as long range.

While the size and weight of the A125 allows this DVL to be used on the smallest of vehicles, having a depth rating of 3000m means this high performance DVL can also be used on vehicles that operate at these extreme depths.

Although a DVL is typically integrated fully to the vehicle for enhanced control, the integrated Attitude and Heading Reference System (AHRS) within the A125 allows the DVL to be used for dead reckoning positioning. This feature allows the A125 to generate an accurate track plot of the vehicles movements without the need to fully integrate with the vehicle control system.