1969, Deep-sea Fishing Trawler TROPITZ 1 Bulgarian stotinka

Deep-sea Fishing Trawler TROPITZ 1969

Deep-sea Fishing Trawler TROPITZ Ocean Fishing and fish 1 Bulgarian stotinka 1969

Text: Deep-sea Fishing Trawler TROPITZ Ocean 1 Bulgarian stotinka 1969

Condition: Ø = used/cancelled

Title:   Ocean Fishing and fish

Face value:     1

Stamp Currency:       Bulgarian stotinka

Country/area:            Bulgaria

Year:   1969

Set:     1969 Ocean Fishing and fish

Stamp number in set:           1

Basic colour:  Blue, Grey

Exact colour: 

Usage:            Franking

Type:   Stamp

Theme:           Boats, Ships, Fishery

Stamp subject:          

Michel number:         1947

Yvert number:                       1732

Scott number:                        

Stanley Gibbons number:    1949    

Printing office:            

Perforation:    11

Printing:         Photogravure

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Fishing trawler

A fishing trawler (also called a dragger) is a commercial fishing vessel designed to operate fishing trawls. Trawling is a method of fishing that involves actively dragging or pulling a trawl through the water behind one or more trawlers. Trawls are fishing nets that are pulled along the bottom of the sea or in mid water at a specified depth. A trawler may also operate two or more trawl nets simultaneously (double-rig and multi-rig).

There are many variants of trawling gear. They vary according to local traditions, bottom conditions, and how large and powerful the trawling boats are. A trawling boat can be a small open boat with only 30 hp or a large factory ship with 10,000 hp. Trawl variants include beam trawls, large-opening mid water trawls, and large bottom trawls, such as "rock hoppers" that are rigged with heavy rubber wheels that let the net crawl over rocky bottom.

Trawler types

Trawlers can be classified by their architecture, the type of fish they catch, the fishing method used, or geographical origin. The classification used below follows the FAO, who classify trawlers by the gear they use.

1.      Outrigger trawlers

2.     Beam trawlers

3.     Otter trawlers

4.     Pair trawlers

5.     Side trawlers

6.     Stern trawlers

7.      Freezer trawlers

8.     Wet fish trawlers

9.     Trawler/purse seiners

10. Naval trawlers