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Table 4
1 Some slow drag in all sets of Luke. 2 Diver reported anchor plowing furrow. 3 High read at 1020 not held - anchor hauled and found fouled with kelp. CQR given a 90-degree veer test here and held to 1200. 4 More sand, less rock in first three sets. The vessel location played a major role in performance so the first three sets of the Delta are not comparable. Delta was given veering tests here and on 90-degree test did 1400, 450, 1200, 550, on 180-degree did 900, 450, 1350, 1000, all in sand. 5 First test of Performance 35 fouled on cable, test not counted. 6 Anchor held 8 seconds at 850 then broke free. Site 3. Inner Port Madison Harbor. Generally Port Madison was good holding. A thick mud bottom typical of many northwest anchorages. Some shell and a little weed. Chuck Hawley of West Marine reported it was considerably more firm than the San Francisco ooze tested in 1990. It could best be described as sticky mud5. For example, the Fortress when set in the large angle "mud" position did not set at all. The flukes apparently did not penetrate. When the flukes were set in the shallow position for harder bottom it immediately set to 4410, 3320 and 4230 lbs. The Fortress set so deep that the rode had to be hauled in to 1:1 and significant power applied to rode by the 83,000-pound tug to break it free. It is doubtful that a sailboat would have windlass power to break it out. Perhaps large primary winches or a rising tide might be adequate. However, it is also doubtful that a sailboat could have set the anchor that deep in less than a full hurricane. Table 5
*Maximum horsepower on trawler yacht Portage Bay. 1 Again Luke moving slowly. Some weed and eel grass encountered at entrance. 2 Tests 3, 4, 5 encountered eel grass in entrance. Tests 1 and 2 in clean mud area. 3 More weed and grass in this area. 4 Broke out at 2200. 5 At 2200 anchor at slow drag but did not break free. 6 Anchor badly bent shank and bent fluke at 3400. According to manufacturer the MAX 17 is designed for a maximum of 2800 lbs. and for boats over 35,000 lbs. displacement a MAX 20 (56 lbs.) should be used. 7 Tests 2 and 3 at deep angle set 450 for mud bottoms. Anchor probably failed to penetrate. See text. 8 MAX set for deep angle soft mud on this test, whereas the mud was sticky and dense. Site 4. Jefferson Head along the south bluff to the east of the lagoon. Bottom similar to Wing Point. No kelp showing on the surface and only a small kelp area indicated on the chart. Lots of small rock 4"-6" and some larger, mixed with sand, shell varieties of weed and kelp. A poor area for anchors. As with Wing Point, several anchors hung up and showed resistance. This may have been an illusion of any real firm set as all anchors ultimately broke loose. The divers reported that the rocks prevented the anchors from burying in the soil. Table 6
1 On fourth test the Bruce brought up a 60-lb. granite stone. 2 Anchor dragged on test 2 at 950-1100. 3 Bent Fluke. Site 5. North Side of Blake Island. When surveyed in April it was found to have hard clay bottom and eel grass. During testing the tide was at minus level and the boats worked in a slightly deeper area at 15' depths which turned out to be more sand. The chart indicates sand further out than the area worked. There was eel grass which was intermittently pulled up on the anchors. In general, the area was good holding.
Table 7
1 The Luke actually held at this site. 3 Tug slacked off speed to take radio message then surged ahead at increased rpm and broke out anchor. 4 Drag at 2800 came up with eel grass. 5 Broke out at 2100 bent both flukes. *Power shut down before drag. |
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