4.2. Evaluation of anchor holding forces

The holding force of an anchor is strongly dependent of the sea bottom type (anchor ground). The value of the ground coefficient is presented the Table 2.

Type of sea floor Ground coefficient Clay 4 Heavy sand 3 Sand / mud 2 Mud 1

Table 2 Ground coefficient

The above mentioned values show that the holding power of an anchor is significantly dependent on the type of sea floor. Another important aspect is related to the anchor type. It is important to underline that the Delta Flipper anchors are high holding power (HHP) ones and, consequently, the anchor coefficient is high. Taking into account the above mentioned characteristics the estimations of the holding capacities for each type of anchor are presented in the Table 3 and graphically represented in Fig. 3.

Ground coefficient

[-]

Holding capacity Anchor type 1

[kN]

Holding capacity Anchor type 2

[kN] 1 98.1 137.3 2 196.2 274.7 3 294.3 412.0 4 392.4 549.4

Table 3 Holding capacity as function of ground coefficient

Fig. 3 Dependency of holding capacity on sea bottom composition