IMPACT SUBSEA
INNOVATIVE UNDERWATER PRODUCTS
www.impactsubsea.com
Document No:
0000.1991 |
Version No:
1.6 | 6
th
October 2020
28
The distance the acoustic pulse has travelled can then be calculated by this simple equation:
Distance = Speed x Time
In water, the speed of sound is typically around 1,500 meters per second. This is influenced by
various factors (temperature, salinity & pressure). However, for the purpose of this explanation,
we will assume a speed of sound of 1,500m/s.
If an acoustic pulse takes 0.1 second to return to the ISS360 sonar after being sent, we can
calculate its round-trip travel distance as:
Distance = Speed x Time
= 1,500 x 0.1
= 150m
Therefore, the total distance the sound has travelled is 150m (journey to the
journey back from the seabed).
To calculate the distance, we simply half this value. I.E. the range to target is 75m.
The target would then be plotted on screen at a range of 75 meters.