Crest element for a breakwater, armour layer assembly for a breakwater, breakwater, method of cresting a breakwater, and method of providing an armour on a breakwater

An armor layer assembly for a breakwater, comprising:

• a plurality of horizontal rows of armor elements;
• and
• a horizontal row of crest elements,
• wherein each armor element of said armor elements comprises a central part with protrusions that consist of:
• two wings extending from the central part in opposing directions along a length direction of the breakwater,
• a tail extending from the central part in a backward direction towards the breakwater and transverse to the length direction of the breakwater, and
• a nose extending from the central part in a forward direction opposite to the backward direction,
• wherein the wings of the armor elements of each horizontal row of said horizontal rows of armor elements are mutually aligned,
• wherein the noses of the armor elements of an above horizontal row of said horizontal rows of armor elements are supported on the armor elements of a below horizontal row of said horizontal rows of armor elements,
• wherein each crest element of said crest elements comprises a central part with protrusions,
• said central part having an upper side, a lower side, a backside, a front side, a left side, and a right side,
• and the protrusions of each crest element consisting of:
• two wings, extending from the right side and the left side, respectively, of the central part in opposing directions along, when placed on a breakwater, the length direction of the breakwater, and
• a nose extending from the front side of the central part in a forward direction transverse to the length direction of the breakwater,
• wherein the wings of the crest elements of the horizontal row of crest elements are mutually aligned,
• wherein the horizontal row of crest elements is placed above an upper one of said horizontal rows of armor elements with the noses of the crest elements of the horizontal row of crest elements supported on top of the armor elements of the upper one of said horizontal rows of armor elements,
• wherein the backside of the central part of the crest elements is a vertically-oriented, back face facing in the backward direction opposite to the forward direction, and
• wherein the wings of each of said crest elements have a backside which is a vertically-oriented back face flush with the back face of the central part of a respective crest element of said crest elements.