Specifications

Tritech International Ltd SeaKing System Options OM
Issue 3 TIL – Eng – Spec – 040 Page 23 of 44
1. Standard UK90 String Format
This format provides a string format that is identical to the original UK90 string format.
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 Std - 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

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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).