Gollevainen, Hood, adenandy, Judah14, eswube, Skyder2598, wb21, Thiel : thank you, today is research and survey vessel. plan to draw in january but i have no underwater hull photo, until found its in local shipyard facebook, lucky day.
Hydrographic Department, Royal Thai Navy
The Hydrographic Department Royal Thai Navy (HDRTN), founded in 1919, is the Thai government organisation under the control of Royal Thai Navy responsible for surveying Thai navigable waterways and producing official nautical charts and nautical publications to serve safety of navigation, naval operations and private-sector requirements.
Its national responsibilities and commitments embrace several areas. It publishes the national chart series (71 charts) covering Thai waters. It also produces National Tide Tables, Sailing Directions and Lists of Lights and Buoys in Thai Waters. It is further responsible for compiling and maintaining the Thai hydrographic and oceanographic data collection, providing and maintaining aids to navigation in Thai waters, maintaining Thai Standard Time and providing weather forecasting for Thai naval warships/aircraft and mariners navigating in Thai waters.
Chandhara class : Oceanographic Research Ship
HTMS Chantara carries out hydrographic surveys and modern multi-beam system. She was used as royal reside ship for thailand's king bhumibol adulyadej when visit people who live in coastal or remote island (1961-1983).
Specifications:
Builder: Friedrich Lurssen Werft ,Germany
Commissioned RTN: 1961
Displacement: 996 tons full load
Length: 69.9 m
Beam: 10.5 m
Draft: 3.2 m
Crew: 70
Armament: 1xBofors 40/60 mm machine gun, 1xOerlikon 20mm machine gun
Small boats: 6
Propulsion: 2 Diesel MWM (Deutz), 1,090 bhp
Shaft: 2 shafts
Speed: 13 kts
Range : 10,000 nm @ 10 kts