WAVERIDER, waveheight measuring system

Cost break-down:

1 Waverider/Fl 0.7 m diam, AISI316 hull, batteries installed

for 10 months, HF radio link 27-30 MHz	NLG	27,800 .--

1 Diwar receiving unit, incl. antenna & cable	"	15,900 .--

1 Standard mooring system (max. depth 130 m low tide)	"	4,370 .--

1 Anti-spin triangle	"	1,250 .--

1 On-line datahandling software (DOS pc)	"	1,975 .--

NLG	51,295 .--

Testequipment/spares/consumables:

1 Servicekit for Waverider/Fl	NLG	6,350 .--

1 Diwar test unit incl. 1 crystal	"	3,490 .--

1 Antennawhip for Waverider	"	130 .--

1 Rubbercord with terminals	"	2,030 .--

1 Set of 26 batteries for Waverider 0.7 m (10 months)	"	910 .--

"	12,910 .--

Ex works, packed,	NLG	64,205 .--

As above but 0.9 m diam Waverider instead of 0.7 m,

0.9 m triangle and 2 sets batteries (20 months)	NLG	71,545 .--

Remarks:

1) Waverider hull material.

Above a Waverider with AISI316 stainless steel hull is listed.

Especially in tropical waters a stainless steel hull often gets fouled which can result in

serious crevice corrosion (especially under barnacles).

This can be prevented by using hulls of Cunifer10 (copper/nickel alloy) which shows good anti-fouling properties and will not pit.

Cost of same Waverider but with Cunifer10 hull NLG 29,800.--.

2)	In case water current exceeds 1.5-2 knots a Waverider with 0.9 m diam. hull is advisable to prevent submerging. Cost incl. battery set for 20 months NLG 34,000.-- (AISI316 hull) and NLG 37,800.-- with Cunifer10 hull.

Cost of triangle for Waverider 0.9 m diam. is NLG 1,480.--.

3)	Anti-spin triangle is advisable at places where risk of ships collision exists to prevent spinning of the buoy; excessive spinning may damage the sensor.

4)	Optional mooring systems:

Ma)	For depth up to 25 m low tide	NLG	2,940 .--

Mb)	For depth 25 - 130 m low tide	"	4,230 .--

Maa)	For depth up to 25 m low tide,

rubbercord provided with safety line	"	4,320 .--

Mbb)	For depth 25 - 130 m low tide,

rubbercord provided with safety line	"	5,610 .--

Mcc)	For depth up to 130 m low tide,

rubbercord provided with safety line	"	5,750 .--

For depths exceeding 130 m additional mooring materials are available.

5)	Diwar, digital Waverider receiving station.

This unit in combination with a personal computer gives data reception and data handling at site. The unit is equipped with an RS232 communication port as well as an analog output.

Control, programming, read out and testing is by means of a (personal) computer.

- page 2 -

6)	Software (on-line).

With the datahandling software (DOS-pc) following information is presented

(almost real time):

Spectral information:

- Administration data

- Energy spectrum (frequency resolution 0.01 Hz)	corrected for low

- Hs (as 4 M0)	frequency attenuation

- Tz (as M0/M2)	of the Waverider

- Data quality report

- Buoy signal strength indication

- Sea surface temperature (for Waveriders with temperature channel)

or

Statistical information:

- Administration data

- Hmax, Thmax

- H1/3, T1/3

- H1/10, T1/10

- Havg, Tavg

- EPS4

- Data quality report

- Sea surface temperature (for Waveriders with temperature channel)

From zero-upcrossing waves with the amplitude transfer of the Waverider corrected up to 35 seconds period time, values are assembled over sets of 128, 256, 512 or 1024 waves.

7)	Software, off-line.	NLG	2,500 .--

Processing of raw data, including possibility to communicate with

remote Diwar-PC station via modem (DOS pc).

8)	Measurement of sea surface temperature with the Waverider (optional).

Waverider/Fl:

- 70 cm diam/temperature channel/Cunifer10 hull	NLG	33,800 .--

- 90 cm diam/ " " /AISI316 hull	NLG	38,000 .--

- 90 cm diam/ " " /Cunifer10 hull	NLG	41,800 .--

Diwar receiving unit with temperature channel	NLG	17,900 .--

Servicekit for Waverider/Fl with temperature channel	NLG	7,565 .--

9)	Data transmission and tracking via Argos satellite (only

available with 90 cm diam. Waveriders).

As the standard radio link is not present in this case, the Diwar,

datahandling software and test unit are no more needed.

For Waverider/Fl 90 cm diam.	NLG	13,450 .--

For Waverider/Fl 90 cm diam. with sea surface temperature option	NLG	12,700 .--

Software to present wavedata from the data received from the

Argos groundstation	NLG	835 .--

Batterylife around 18 months.

10)	Data transmission via standard radio link and tracking via Argos

satellite (only available with 90 cm diam. Waveriders).

For Waverider/Fl 90 cm diam. with and without sea surface

temperature option	NLG	11,350 .--

Batterylife around 14 months.

11)	Internal recording, no transmission.

Logging capacity 340 days with half hourly storage	NLG	12,000 .--

Read-out and presentation is via personal computer,

cost of software (DOS pc)	NLG	1,150 .--