A lot of man made objects like piers, groynes, and breakwaters map to the Shoreline Construction type in the S-57 standard.
Fisherman and Navigators are most used to water type objects being classified under this standard.
Sven's remark is likely that he downloaded the .
OSM file rather than the .OSM.
PBF file and did a find replace on the "man_made=groyne" tag.
The .OSM standard is just the OSM data stored within an XML structure.
The .OSM.PBF standard uses binary encoded compressed data based off a Google Reader/Writer.
http://www.s-57.com/Object Type: SLCONS
Geometric primitives: P, L, A
Set Attribute_A: CATSLC; COLOUR; COLPAT; CONDTN; CONRAD; CONVIS; DATEND; DATSTA; HEIGHT; (?)HORACC; HORCLR; HORLEN; HORWID; NATCON; NOBJNM; OBJNAM; STATUS; (?)VERACC; (?)VERDAT; VERLEN; WATLEV;
Set Attribute_B: INFORM; NINFOM; NTXTDS; (?)SCAMAX; SCAMIN; TXTDSC;
Set Attribute_C: (?)RECDAT; (?)RECIND; SORDAT; SORIND;
Definition:
A fixed (not afloat) artificial structure between the water and the land, i.e. a man-made coastline.
References:
INT 1: IF 2, 4, 5, 6, 12-15, 18,23, 33;
M-4: 313.2, 4; 321.1-4; 322.1-2; 324.1;
Remarks:
Distinction:
canal bank; coastline; lake shore; land area; pontoon; river bank;
Attribute Type: CATSLC
Attribute type: E
Used in: SLCONS
Expected input:
ID Meaning INT 1 M-4
1 breakwater IF 4.1-3; 322.1;
2 groyne (groin) IF 6.1-3; 313.4;
3 mole IF 12; 321.3;
4 pier (jetty) IF 14; 321.2,4;
5 promenade pier IF 15; 321.2;
6 wharf (quay) IF 13; 321.1;
7 training wall IF 5; 322.2;
8 rip rap
9 revetment
10 sea wall IF 2; 313.2;
11 landing steps IF 18;
12 ramp IF 23;
13 slipway IF 23; 324.1;
14 fender
15 solid face wharf
16 open face wharf
17 log ramp
Remarks:
The attribute 'category of shoreline construction' encodes the usage of a shoreline construction.