1 Established in employees Product development, production, marketing and sales of side scan sonar systems type SH Performs: - Sea floor surveys - Search for lost objects and equipment - Documentation of wrecks - Search for sunken timber - Documentation of dams, rivers and creeks - Surveys for cable and pipe laying - Documentation and inspections of harbors - Surveys for pre-engineering and feasibility studies - Diving and photo and film documentation

2 P51 Mustang / J26 ”Blue Olof” from the Swedish airforce, lost in 1946, was found 2003 at 50 meters depth with equipment from Swedish Sonar Services AB.

3 SH 200/500/800 kHz Designed by Sture Hultqvist

4 Side Scanning Sonar SH 200/500/800 kHz The System consists of: – –Electronic box for signal detection in waterproof box – –Sonar fish/underwater body for ultra sound – –Cable (70 m std) – –Software for image generating – –PC for image handling and storage (not included) – –GPS-receiver (not included) – –Total weight < 30 kg

5 SH 200/500/800 Technical specification 1. 1.Frequency 200, 500 or 800kHz 2. 2.Beam width 200kHz (depending on freq: vertical 60 o ; longitudinal direction perpendicular to towing <1 o (The elements are angeled 25 o down. The Aperture is 407x5 mm2 for short fish and 610x5 mm2 for long fish. 500 kHz has the same aperture lenght but is only 3 mm wide. There is no shadowing from the sensors Swath width: Normally 400 m. 600 m with less resolution Max speed with full bottom coverage. Typical towing speed is 6 knots. Maximum 8 knots 5. 5.Bottom resolution. 15 cm, less at higher speeds and larger distances The device cab optionally measure the distance to the sea bottom (topographic mapping). The water column and the surface reflex in the middle of the image give depth information etc Array: Linear (Separate elements are not accessible) Synchronization of pings with parallel systems is possible.

6 SH 200/500/800 Applications Sea bottom surveys: Sea, lakes, dams. Positioning of objects on the sea bottom and in the water e.g. wrecks, lost or dumped equipment, mines, human bodies etc. Inspection of under water equipment and constructions. Mapping (requires extra software), even with several parallel vessels (raking) Surveillance of suspicious underwater activities with mobile or fixed equipment.

7 Lancaster bomber WW2 Track on the bottom after dragging or anchor.

8 Nedjan Disappeared in a winter storm 1954 outside Gävle Found in 2000 with the equipment SH 200

9 Nordstjernan 1

10 Note detailes. The ship rests at 120 m depth.

11 Mailship type side-wheeler

12

13 S7 – Russian submarine Torpedo blown stern Shadow of canon, tower and netknife.

14 Bottom shapes

15 Boat Ca 4-5 meter long with out- border 20 meters depth.

16 Fishing net

17 Unidentified object

18 Image from the bottom outside a quay. Notice car tire.

19 Tug ”Polarbear”. Used as a gunboat during ww2.

20 Quay support outside the harbour of Swedish Steel AB Oxelösund. Cooling pipe of wood. Diam. ca 32 in. Tires

21 Oil barrels