Specifications

Tritech International Ltd SeaKing System Options OM
Issue 3 TIL – Eng – Spec – 040 Page 24 of 44
2. Alternate UK90 String Format
This format provides a string format that is very similar to the standard UK90 string format but with
the second altitude reading removed.
The following serial data formats are configurable on the UK94 surface unit:
a) 4800 baud, 8 data bits, 2 stop bit, no parity.
b) 9600 baud, 8 data bits, 2 stop bit, no parity.
[These may need to be configured on the SCU to replicate a UK94 output if the receiving terminal
expects this data format]
UK90 Alt - Reply Data Structure
Data Description Data Range Field Range
Depth in metres (includes entered vertical or zero offsets) 0 to 4000.00 Dxxxx.xx
Space character N/A

Altitude in metres (includes entered vertical offset) 0 to 99.99 Axx.xx
Space character N/A

Temperature in degrees Centigrade 0 to 35 Txx
7 x Space characters N/A

Atmospheric pressure in mbar (either manually entered
value or obtained from the surface Barometric sensor)
900 to 1100 Pxxxx
Space character N/A

Velocity of Sound in metres per second * 10 (calculated
from Conductivity readings or ‘Manual’ VOS if no CT probe)
14000 to 15500 Vxxxxx
Space character N/A

Mean density of seawater * 10000 (or Manual entered
value if no CT probe readings)
9000 to 11000 dxxxxx
Space character N/A

Height in metres of Barometric Sensor above Sea level 0 to 99 Hxx
Terminator (Carriage Return + Line Feed) N/A <CR><LF>
Example:
Depth = 136.92 metres = D0136.92
Altimeter reading = 24.75 metres = A24.75
Temperature reading = 5 degrees C = T05
Atmospheric Pressure = 1004 mbar = P1004
Velocity of Sound = 1475 m/s = V14750
Relative Seawater Density = 1.019 = d10190
Height above Sea-level = 15 metres = H15
ASCII Output Always =
“D0136.92A24.75T05P1004V14750d10190H15<CR><LF>”
Where; “” is a space (ASCII code 32),
“<CR>” is Carriage Return (ASCII code 13),
“<LF>” is Line Feed (ASCII code 10).