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ULTRA Products by Boyut – exclusive European distribution by cromox®

ULTRA Side Pocket Anchor

Our ULTRA Side Pocket Anchor for fast setting and secure holding in demanding applications

The ULTRA Side Pocket Anchor is the result of long-term research and engineering development and is designed to set quickly and hold securely. Its geometry engages immediately on contact with the seabed and builds holding power through a wide contact surface and strong fluke profile. The angled shank is designed to embed without resistance, supporting deeper engagement. The anchor is produced in different versions to match installation and performance requirements.

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ULTRA Seitenanker – Ansicht 1
ULTRA Seitenanker – Ansicht 2
ULTRA Seitenanker – Ansicht 3
ULTRA Seitenanker – Ansicht 4
ULTRA Seitenanker – Ansicht 5
ULTRA Seitenanker – Ansicht 6
ULTRA Seitenanker – Ansicht 7

Key performance features

  • Fast and secure setting behaviour. 
  • Thin front fluke tips for easier seabed penetration. 
  • Wide contact surface for high holding power.
  • Angled shank design for resistance-free embedding. 
  • Self-cleaning, jam-free swivelling mechanism (as specified). 
  • Handmade in Standard and Compact versions from 21 kg to 1500 kg. 
  • Stainless-steel construction (316L and 318LN); galvanizing is not required. 
  • 10-year warranty.

Design and construction of our ULTRA Side Pocket Anchor

The ULTRA Side Pocket Anchor is engineered to engage immediately: bent rear wings are described as forcing a scraping action as soon as the anchor touches the seabed, supporting instant “bite”. Thin fluke tips promote penetration, while the broad contact area and robust fluke profile are designed to deliver holding performance across different seabed conditions.

The angled shank slices through seabed material with reduced resistance, increasing embedding depth. A dedicated swivelling mechanism is described as self-cleaning and designed to operate smoothly over time without jamming.

Construction details

  • Engagement geometry: rear wings and fluke design for immediate seabed engagement. 
  • Shank: angled for resistance-free embedding and increased depth. 
  • Mechanism: self-cleaning swivel mechanism designed to avoid jamming (as described). 
  • Materials: premium stainless steels specified as 316L and 318LN, hand polished. 
  • Options: Standard or Compact – balanced or unbalanced configurations (as listed).
Ultra Side Pocket Anchor Selection Table
Recommended
Ultra
Side Pocket
Anchor
Weight
Sail BoatPower BoatMultihull
MONO HULL
HIGH PROFILE
LOW PROFILE
SAIL
POWER
(kg) / (lbs)Weight(ton)Weight(lbs)Length(m)Length(feet)Weight(ton)Weight(lbs)Length(m)Length(feet)Length(m)Length(feet)Weight(ton)Weight(lbs)Length(m)Length(feet)Length(m)Length(feet)
21/463,88 3809,0304,29 2609,33110,2332,75 9507,8268,227
27/606,313 89010,8356,915 21011,13612,2404,59 9209,3319,832
35/7710,222 49012,64111,224 69013,04314,3477,316 10010,93611,538
45/10014,632 19014,34716,035 27014,74816,25310,523 15012,44113,043
60/13221,547 40016,05223,551 80016,55418,26015,634 40013,84514,648
80/17630,066 14017,85832,972 53018,36020,16621,647 62015,45116,253
100/22043,094 80020,06647,1103 83020,66822,77431,068 34017,35818,260
130/29063,0139 88022,37369,0152 12023,07525,38345,4100 10019,36320,367
160/35085,0187 00024,58093,0205 00025,28327,79161,0134 00021,27022,373
200/440123,0271 00027,490135,0298 00028,29331,010289,0196 00023,77825,082
250/550174,0384 00030,4100191,0421 00031,310334,4113125,0276 00026,38627,791
300/660262,0578 00034,4113287,0630 00035,411639,0128190,0419 00029,89831,3103
360/800400,0882 00039,2129438,0966 00040,413344,4146290,0639 00033,911135,7117
420/925550,01 213 00044,0144600,01 323 00045,314949,8163400,0882 00038,112540,0131
500/1100760,01 675 00050,0164830,01 830 00051,516956,7186550,01 213 00043,314245,5150
Recommended
Ultra
Side Pocket
Anchor
Weight
Sail Boat
MONO HULL
(kg) / (lbs)Weight(ton)Weight(lbs)Length(m)Length(feet)
21/463,88 3809,030
27/606,313 89010,835
35/7710,222 49012,641
45/10014,632 19014,347
60/13221,547 40016,052
80/17630,066 14017,858
100/22043,094 80020,066
130/29063,0139 88022,373
160/35085,0187 00024,580
200/440123,0271 00027,490
250/550174,0384 00030,4100
300/660262,0578 00034,4113
360/800400,0882 00039,2129
420/925550,01 213 00044,0144
500/1100760,01 675 00050,0164
Recommended
Ultra
Side Pocket
Anchor
Weight
Power Boat
HIGH PROFILE
LOW PROFILE
(kg) / (lbs)Weight(ton)Weight(lbs)Length(m)Length(feet)Length(m)Length(feet)
21/464,29 2609,33110,233
27/606,915 21011,13612,240
35/7711,224 69013,04314,347
45/10016,035 27014,74816,253
60/13223,551 80016,55418,260
80/17632,972 53018,36020,166
100/22047,1103 83020,66822,774
130/29069,0152 12023,07525,383
160/35093,0205 00025,28327,791
200/440135,0298 00028,29331,0102
250/550191,0421 00031,310334,4113
300/660287,0630 00035,411639,0128
360/800438,0966 00040,413344,4146
420/925600,01 323 00045,314949,8163
500/1100830,01 830 00051,516956,7186
Recommended
Ultra
Side Pocket
Anchor
Weight
Multihull
SAIL
POWER
(kg) / (lbs)Weight(ton)Weight(lbs)Length(m)Length(feet)Length(m)Length(feet)
21/462,75 9507,8268,227
27/604,59 9209,3319,832
35/777,316 10010,93611,538
45/10010,523 15012,44113,043
60/13215,634 40013,84514,648
80/17621,647 62015,45116,253
100/22031,068 34017,35818,260
130/29045,4100 10019,36320,367
160/35061,0134 00021,27022,373
200/44089,0196 00023,77825,082
250/550125,0276 00026,38627,791
300/660190,0419 00029,89831,3103
360/800290,0639 00033,911135,7117
420/925400,0882 00038,112540,0131
500/1100550,01 213 00043,314245,5150

Comments

  • When selecting ULTRA Anchors in excess of 500 kg / 1100 lbs, please consult Lloyd’s or a comparable certification society’s guidelines. The listed values should be used for preliminary selection only.
  • If used in a side pocket setup, the anchor must be “Balanced”.
  • If used in a bow setup, the anchor should be “Unbalanced”.
  • This table applies to all Ultra Side Pocket Anchors, both Standard and Compact.

Warranty

  • Properly selected ULTRA Side Pocket Anchors are covered by our lifetime warranty against issues arising from production or normal use.

Caution

  • The ULTRA Side Pocket Anchor is designed to handle extremely heavy loads; caution is advised when handling.
  • All materials have resistance limits. Using high-powered engines to free an anchor may deform it and/or damage the vessel.
  • It is recommended to use a trip line to recover an anchor stuck under an obstruction.

ULTRA Anchor includes a lifetime warranty against material defects including bending, breaking, cracking, and rusting (as defined by the manufacturer). Warranty registration is available via the warranty registration link.

Register warranty

FAQs

A side pocket anchor is designed for vessels that store the anchor within a recessed pocket in the hull rather than on a conventional bow roller. This installation method requires a specific anchor geometry that supports reliable deployment, secure stowage, and smooth recovery while maintaining the vessel’s exterior lines.

The ULTRA Side Pocket Anchor is engineered for fast engagement, deep penetration, and high holding power. Features such as the thin fluke tips, angled shank, and wide contact surface work together to help the anchor establish a secure hold quickly across a variety of seabed conditions.

Holding power is generated through a combination of penetration depth and contact area. The ULTRA Side Pocket Anchor is designed to embed deeply into the seabed while its broad fluke profile creates significant resistance against movement, helping the anchor remain secure under load.

An anchor that penetrates deeply into the seabed can develop greater holding power and is generally less likely to drag when exposed to increasing wind or current loads. Deeper embedding also helps maintain stability when conditions change during an anchoring period.

The self-cleaning swivel mechanism is designed to maintain smooth operation during deployment and retrieval by reducing the risk of debris accumulation and mechanical jamming. This can contribute to more reliable anchor handling over time, particularly in demanding marine environments.

Side pocket anchors are commonly found on larger motor yachts, superyachts, commercial vessels, and custom-designed boats with integrated anchor pockets. The correct anchor size and configuration should always be selected according to the vessel’s dimensions, displacement, and installation requirements.

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