DVL-Aided INS Module
INS options include the Kearfott T24, the Kearfott T16 and the IxBlue ROVINS-154. These are navigation-quality INS systems which provide very accurate short-term navigation and motion sensing. They are integrated with a DVL (and GPS when surfaced) to provide a highly accurate AUV navigation solution. With the T24 INS and 600kHz DVL the navigation accuracy for the AUV going in a straight line is better than 5.5m in 6km (1hr submerged), or ~25m for the T16 (same conditions). ROVINS-154 accuracy figures are available on enquiry. The navigation accuracy is improved when running a lawnmower survey pattern, resulting in about 2m/hour navigation drift rate for the T24/600kHzDVL (conditions and survey pattern dependent).
