Page 145 - Barbara Merry - The Splicing Handbook

Wire halyards are often constructed of 7 × 19 flexible stainless wire. (Loos)
There is also 7 × 7 lanyard wire, which consists of a center bundle of seven

wires surrounded by six bundles of seven wires.

Lifelines are often constructed of 7 × 7 flexible wire. (Loos)
The last parameter is the type and quality of the metal used in the manufacture
of the wire: type 302/304 (commercial grade) stainless steel, type 316
(corrosion-resistant) stainless steel, galvanized wire, and so on.

A note on measurements: when you buy coated wire for lifelines, you will
often find two diameters. The first is the base diameter of the wire itself and the
second is the base diameter plus the coating.
Wire configurations that are the most commonly found on boats are listed
below.

Stainless Steel and/or Galvanized

1 × 19 wire rope (nonflexible, standing rigging, also for guying
applications)
1 × 7 wire rope (nonflexible, in small sizes for fishing leaders and lines)

7 × 7 stainless steel wire (lanyard wire, often used in lifelines)

7 × 7 galvanized wire
7 × 19 flexible wire, used for halyards
7 × 16

6 × 25 IWRC (Independent Wire Rope Core)

Types of Galvanized Wire